[{"data":1,"prerenderedAt":1023},["ShallowReactive",2],{"announcement":3,"i-tabler:sun":11,"i-tabler:moon":16,"i-tabler:menu-2":18,"i-tabler:x":20,"i-simple-icons:youtube":22,"i-simple-icons:github":24,"i-simple-icons:x":26,"i-simple-icons:linkedin":28,"i-tabler:arrow-up-right":31,"post-javascript-analysis-masterclass-pt-1":33,"post-nav-javascript-analysis-masterclass-pt-1":1002,"video-javascript-analysis-masterclass-pt-1":1013,"i-tabler:copy":1021},{"startsAt":4,"endsAt":5,"scramble":6,"cta":7,"message":10},"2026-10-13","2026-11-30","Cache Poisoning:",{"href":8,"label":9},"\u002Fcache-poisoning-the-cache-you-cant-purge","Read it","The cache you can't purge.",{"left":12,"top":12,"width":13,"height":13,"rotate":12,"vFlip":14,"hFlip":14,"body":15},0,24,false,"\u003Cpath fill=\"none\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2\" d=\"M8 12a4 4 0 1 0 8 0a4 4 0 1 0-8 0m-5 0h1m8-9v1m8 8h1m-9 8v1M5.6 5.6l.7.7m12.1-.7l-.7.7m0 11.4l.7.7m-12.1-.7l-.7.7\"\u002F>",{"left":12,"top":12,"width":13,"height":13,"rotate":12,"vFlip":14,"hFlip":14,"body":17},"\u003Cpath fill=\"none\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2\" d=\"M12 3h.393a7.5 7.5 0 0 0 7.92 12.446A9 9 0 1 1 12 2.992z\"\u002F>",{"left":12,"top":12,"width":13,"height":13,"rotate":12,"vFlip":14,"hFlip":14,"body":19},"\u003Cpath fill=\"none\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2\" d=\"M4 6h16M4 12h16M4 18h16\"\u002F>",{"left":12,"top":12,"width":13,"height":13,"rotate":12,"vFlip":14,"hFlip":14,"body":21},"\u003Cpath fill=\"none\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2\" d=\"M18 6L6 18M6 6l12 12\"\u002F>",{"left":12,"top":12,"width":13,"height":13,"rotate":12,"vFlip":14,"hFlip":14,"body":23},"\u003Cpath fill=\"currentColor\" d=\"M23.498 6.186a3.02 3.02 0 0 0-2.122-2.136C19.505 3.545 12 3.545 12 3.545s-7.505 0-9.377.505A3.02 3.02 0 0 0 .502 6.186C0 8.07 0 12 0 12s0 3.93.502 5.814a3.02 3.02 0 0 0 2.122 2.136c1.871.505 9.376.505 9.376.505s7.505 0 9.377-.505a3.02 3.02 0 0 0 2.122-2.136C24 15.93 24 12 24 12s0-3.93-.502-5.814M9.545 15.568V8.432L15.818 12z\"\u002F>",{"left":12,"top":12,"width":13,"height":13,"rotate":12,"vFlip":14,"hFlip":14,"body":25},"\u003Cpath fill=\"currentColor\" d=\"M12 .297c-6.63 0-12 5.373-12 12c0 5.303 3.438 9.8 8.205 11.385c.6.113.82-.258.82-.577c0-.285-.01-1.04-.015-2.04c-3.338.724-4.042-1.61-4.042-1.61C4.422 18.07 3.633 17.7 3.633 17.7c-1.087-.744.084-.729.084-.729c1.205.084 1.838 1.236 1.838 1.236c1.07 1.835 2.809 1.305 3.495.998c.108-.776.417-1.305.76-1.605c-2.665-.3-5.466-1.332-5.466-5.93c0-1.31.465-2.38 1.235-3.22c-.135-.303-.54-1.523.105-3.176c0 0 1.005-.322 3.3 1.23c.96-.267 1.98-.399 3-.405c1.02.006 2.04.138 3 .405c2.28-1.552 3.285-1.23 3.285-1.23c.645 1.653.24 2.873.12 3.176c.765.84 1.23 1.91 1.23 3.22c0 4.61-2.805 5.625-5.475 5.92c.42.36.81 1.096.81 2.22c0 1.606-.015 2.896-.015 3.286c0 .315.21.69.825.57C20.565 22.092 24 17.592 24 12.297c0-6.627-5.373-12-12-12\"\u002F>",{"left":12,"top":12,"width":13,"height":13,"rotate":12,"vFlip":14,"hFlip":14,"body":27},"\u003Cpath fill=\"currentColor\" d=\"M14.234 10.162L22.977 0h-2.072l-7.591 8.824L7.251 0H.258l9.168 13.343L.258 24H2.33l8.016-9.318L16.749 24h6.993zm-2.837 3.299l-.929-1.329L3.076 1.56h3.182l5.965 8.532l.929 1.329l7.754 11.09h-3.182z\"\u002F>",{"left":12,"top":12,"width":13,"height":13,"rotate":12,"vFlip":14,"hFlip":14,"body":29,"hidden":30},"\u003Cpath fill=\"currentColor\" d=\"M20.447 20.452h-3.554v-5.569c0-1.328-.027-3.037-1.852-3.037c-1.853 0-2.136 1.445-2.136 2.939v5.667H9.351V9h3.414v1.561h.046c.477-.9 1.637-1.85 3.37-1.85c3.601 0 4.267 2.37 4.267 5.455v6.286zM5.337 7.433a2.06 2.06 0 0 1-2.063-2.065a2.064 2.064 0 1 1 2.063 2.065m1.782 13.019H3.555V9h3.564zM22.225 0H1.771C.792 0 0 .774 0 1.729v20.542C0 23.227.792 24 1.771 24h20.451C23.2 24 24 23.227 24 22.271V1.729C24 .774 23.2 0 22.222 0z\"\u002F>",true,{"left":12,"top":12,"width":13,"height":13,"rotate":12,"vFlip":14,"hFlip":14,"body":32},"\u003Cpath fill=\"none\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2\" d=\"M17 7L7 17M8 7h9v9\"\u002F>",{"id":34,"title":35,"body":36,"categories":987,"coverImage":991,"date":992,"description":993,"draft":14,"extension":994,"meta":995,"navigation":30,"noindex":14,"path":996,"readingTime":997,"seo":998,"slug":999,"stem":999,"updatedAt":1000,"youtubeId":42,"__hash__":1001},"blog\u002Fjavascript-analysis-masterclass-pt-1.md","JavaScript Analysis Masterclass - Part 1",{"type":37,"value":38,"toc":969},"minimark",[39,43,47,50,55,58,66,95,98,102,105,110,143,145,149,152,247,249,253,331,334,365,367,371,375,378,469,471,475,478,549,551,554,557,603,605,609,612,663,678,680,684,687,729,732,734,738,763,766,851,853,857,931,934,937,940,943,962,965],[40,41],"post-media",{"video":42},"WnUGRaaDHGw",[44,45,46],"p",{},"JavaScript files are more than just scripts powering a web application. They’re often a direct window into an app’s logic, structure, and sometimes even its vulnerabilities.",[44,48,49],{},"In this guide, we’re diving deep into how to analyze JavaScript files for security bugs, covering static analysis techniques, collection strategies, and how to extract real signals from buried code. This is your full walkthrough, from recon to secrets, tokens, and hidden endpoints.",[51,52,54],"h2",{"id":53},"why-javascript-files-matter","Why JavaScript Files Matter",[44,56,57],{},"JavaScript runs in the browser, which means you, the hacker, have access to all its logic. If it’s in the JS, it’s yours to read, and potentially abuse.",[44,59,60,61,65],{},"Inside ",[62,63,64],"code",{},".js"," files, you’ll commonly find:",[67,68,69,73,76,79,92],"ul",{},[70,71,72],"li",{},"Hidden or undocumented API endpoints",[70,74,75],{},"Hardcoded API keys or secrets",[70,77,78],{},"Internal logic like auth flows, role validators, or pricing mechanisms",[70,80,81,82,85,86,85,89],{},"DOM-based XSS vectors through ",[62,83,84],{},"innerHTML",", ",[62,87,88],{},"eval()",[62,90,91],{},"document.write()",[70,93,94],{},"Debug flags, hidden configurations, and beta features",[96,97],"hr",{},[51,99,101],{"id":100},"step-1-collecting-javascript-files","Step 1: Collecting JavaScript Files",[44,103,104],{},"The first step is to pull in as many JS files related to your target as possible. Here are the methods you should be using:",[106,107,109],"h3",{"id":108},"method-1-burp-suite","Method 1: Burp Suite",[67,111,112,119,122,128,137],{},[70,113,114,115],{},"Set target scope in ",[116,117,118],"strong",{},"Burp",[70,120,121],{},"Browse manually through the app",[70,123,124,125],{},"Navigate to ",[116,126,127],{},"Target > Site Map",[70,129,130,131,134,135],{},"Filter by MIME type ",[62,132,133],{},"script"," and extension ",[62,136,64],{},[70,138,139,140],{},"Copy all URLs to a file ",[62,141,142],{},"js-burp.txt",[96,144],{},[106,146,148],{"id":147},"method-2-wayback-machine-waybackurls","Method 2: Wayback Machine (WaybackURLs)",[44,150,151],{},"This pulls archived JS files, even if they’re no longer linked.",[153,154,159],"pre",{"code":155,"language":156,"meta":157,"className":158,"style":157},"##install it\ngo install github.com\u002Ftomnomnom\u002Fwaybackurls@latest\n\n##run it\necho 'example.com' | waybackurls | grep '\\.js$' | sort -u > js-wayback.txt\n","bash","","shiki shiki-themes vitesse-dark vitesse-light",[62,160,161,170,184,190,196],{},[162,163,166],"span",{"class":164,"line":165},"line",1,[162,167,169],{"class":168},"sy60D","##install it\n",[162,171,173,177,181],{"class":164,"line":172},2,[162,174,176],{"class":175},"swzfi","go",[162,178,180],{"class":179},"sRRDT"," install",[162,182,183],{"class":179}," github.com\u002Ftomnomnom\u002Fwaybackurls@latest\n",[162,185,187],{"class":164,"line":186},3,[162,188,189],{"emptyLinePlaceholder":30},"\n",[162,191,193],{"class":164,"line":192},4,[162,194,195],{"class":168},"##run it\n",[162,197,199,203,207,210,213,217,220,222,225,227,230,232,234,237,241,244],{"class":164,"line":198},5,[162,200,202],{"class":201},"s6_DI","echo",[162,204,206],{"class":205},"sy_C3"," '",[162,208,209],{"class":179},"example.com",[162,211,212],{"class":205},"'",[162,214,216],{"class":215},"sfIIG"," |",[162,218,219],{"class":175}," waybackurls",[162,221,216],{"class":215},[162,223,224],{"class":175}," grep",[162,226,206],{"class":205},[162,228,229],{"class":179},"\\.js$",[162,231,212],{"class":205},[162,233,216],{"class":215},[162,235,236],{"class":175}," sort",[162,238,240],{"class":239},"se4ZP"," -u",[162,242,243],{"class":215}," >",[162,245,246],{"class":179}," js-wayback.txt\n",[96,248],{},[106,250,252],{"id":251},"method-3-archiveorg-cdx-api","Method 3: Archive.org CDX API",[153,254,256],{"code":255,"language":156,"meta":157,"className":158,"style":157},"curl -G \"https:\u002F\u002Fweb.archive.org\u002Fcdx\u002Fsearch\u002Fcdx\" \\\n  --data-urlencode \"url=*.example.com\u002F*\" \\\n  --data-urlencode \"output=text\" \\\n  --data-urlencode \"fl=original\" | grep '\\.js$' > js-cdx.txt\n",[62,257,258,278,292,305],{},[162,259,260,263,266,269,272,275],{"class":164,"line":165},[162,261,262],{"class":175},"curl",[162,264,265],{"class":239}," -G",[162,267,268],{"class":205}," \"",[162,270,271],{"class":179},"https:\u002F\u002Fweb.archive.org\u002Fcdx\u002Fsearch\u002Fcdx",[162,273,274],{"class":205},"\"",[162,276,277],{"class":239}," \\\n",[162,279,280,283,285,288,290],{"class":164,"line":172},[162,281,282],{"class":239},"  --data-urlencode",[162,284,268],{"class":205},[162,286,287],{"class":179},"url=*.example.com\u002F*",[162,289,274],{"class":205},[162,291,277],{"class":239},[162,293,294,296,298,301,303],{"class":164,"line":186},[162,295,282],{"class":239},[162,297,268],{"class":205},[162,299,300],{"class":179},"output=text",[162,302,274],{"class":205},[162,304,277],{"class":239},[162,306,307,309,311,314,316,318,320,322,324,326,328],{"class":164,"line":192},[162,308,282],{"class":239},[162,310,268],{"class":205},[162,312,313],{"class":179},"fl=original",[162,315,274],{"class":205},[162,317,216],{"class":215},[162,319,224],{"class":175},[162,321,206],{"class":205},[162,323,229],{"class":179},[162,325,212],{"class":205},[162,327,243],{"class":215},[162,329,330],{"class":179}," js-cdx.txt\n",[44,332,333],{},"Then validate:",[153,335,337],{"code":336,"language":156,"meta":157,"className":158,"style":157},"cat js-cdx.txt | httpx -mc 200 -o js-live.txt\n",[62,338,339],{},[162,340,341,344,347,349,352,355,359,362],{"class":164,"line":165},[162,342,343],{"class":175},"cat",[162,345,346],{"class":179}," js-cdx.txt",[162,348,216],{"class":215},[162,350,351],{"class":175}," httpx",[162,353,354],{"class":239}," -mc",[162,356,358],{"class":357},"sUQhE"," 200",[162,360,361],{"class":239}," -o",[162,363,364],{"class":179}," js-live.txt\n",[96,366],{},[51,368,370],{"id":369},"step-2-static-analysis","Step 2: Static Analysis",[106,372,374],{"id":373},"grepping-for-secrets","Grepping for Secrets",[44,376,377],{},"Run a grep loop to look for common leaked variables:",[153,379,381],{"code":380,"language":156,"meta":157,"className":158,"style":157},"cat js.txt | while read url; do\n  echo \"[+] Scanning: $url\"\n  curl -s \"$url\" | grep -Eio 'apikey|token|auth|secret|password|jwt' && echo \"--- Found in $url ---\"\ndone\n",[62,382,383,409,422,464],{},[162,384,385,387,390,392,396,399,402,406],{"class":164,"line":165},[162,386,343],{"class":175},[162,388,389],{"class":179}," js.txt",[162,391,216],{"class":215},[162,393,395],{"class":394},"sR8n-"," while",[162,397,398],{"class":201}," read",[162,400,401],{"class":179}," url",[162,403,405],{"class":404},"somML",";",[162,407,408],{"class":394}," do\n",[162,410,411,414,416,419],{"class":164,"line":172},[162,412,413],{"class":201},"  echo",[162,415,268],{"class":205},[162,417,418],{"class":179},"[+] Scanning: $url",[162,420,421],{"class":205},"\"\n",[162,423,424,427,430,432,435,437,439,441,444,446,449,451,454,457,459,462],{"class":164,"line":186},[162,425,426],{"class":175},"  curl",[162,428,429],{"class":239}," -s",[162,431,268],{"class":205},[162,433,434],{"class":179},"$url",[162,436,274],{"class":205},[162,438,216],{"class":215},[162,440,224],{"class":175},[162,442,443],{"class":239}," -Eio",[162,445,206],{"class":205},[162,447,448],{"class":179},"apikey|token|auth|secret|password|jwt",[162,450,212],{"class":205},[162,452,453],{"class":404}," &&",[162,455,456],{"class":201}," echo",[162,458,268],{"class":205},[162,460,461],{"class":179},"--- Found in $url ---",[162,463,421],{"class":205},[162,465,466],{"class":164,"line":192},[162,467,468],{"class":394},"done\n",[96,470],{},[106,472,474],{"id":473},"linkfinder","LinkFinder",[44,476,477],{},"Extract hidden endpoints:",[153,479,481],{"code":480,"language":156,"meta":157,"className":158,"style":157},"##install it\ngit clone https:\u002F\u002Fgithub.com\u002FGerbenJavado\u002FLinkFinder.git\ncd LinkFinder\npip3 install -r requirements.txt\n\n#run it\npython3 linkfinder.py -i https:\u002F\u002Fexample.com\u002F1.js -o cli\n",[62,482,483,487,498,506,519,523,529],{},[162,484,485],{"class":164,"line":165},[162,486,169],{"class":168},[162,488,489,492,495],{"class":164,"line":172},[162,490,491],{"class":175},"git",[162,493,494],{"class":179}," clone",[162,496,497],{"class":179}," https:\u002F\u002Fgithub.com\u002FGerbenJavado\u002FLinkFinder.git\n",[162,499,500,503],{"class":164,"line":186},[162,501,502],{"class":201},"cd",[162,504,505],{"class":179}," LinkFinder\n",[162,507,508,511,513,516],{"class":164,"line":192},[162,509,510],{"class":175},"pip3",[162,512,180],{"class":179},[162,514,515],{"class":239}," -r",[162,517,518],{"class":179}," requirements.txt\n",[162,520,521],{"class":164,"line":198},[162,522,189],{"emptyLinePlaceholder":30},[162,524,526],{"class":164,"line":525},6,[162,527,528],{"class":168},"#run it\n",[162,530,532,535,538,541,544,546],{"class":164,"line":531},7,[162,533,534],{"class":175},"python3",[162,536,537],{"class":179}," linkfinder.py",[162,539,540],{"class":239}," -i",[162,542,543],{"class":179}," https:\u002F\u002Fexample.com\u002F1.js",[162,545,361],{"class":239},[162,547,548],{"class":179}," cli\n",[96,550],{},[106,552,553],{"id":553},"jsleak",[44,555,556],{},"Grab secrets, keys, and AWS creds:",[153,558,560],{"code":559,"language":156,"meta":157,"className":158,"style":157},"##install it\ngo install github.com\u002F0xTeles\u002Fjsleak\u002Fv2\u002Fjsleak@latest\n\n##run it\ncat live-js.txt | jsleaks -s -l -k\n",[62,561,562,566,575,579,583],{},[162,563,564],{"class":164,"line":165},[162,565,169],{"class":168},[162,567,568,570,572],{"class":164,"line":172},[162,569,176],{"class":175},[162,571,180],{"class":179},[162,573,574],{"class":179}," github.com\u002F0xTeles\u002Fjsleak\u002Fv2\u002Fjsleak@latest\n",[162,576,577],{"class":164,"line":186},[162,578,189],{"emptyLinePlaceholder":30},[162,580,581],{"class":164,"line":192},[162,582,195],{"class":168},[162,584,585,587,590,592,595,597,600],{"class":164,"line":198},[162,586,343],{"class":175},[162,588,589],{"class":179}," live-js.txt",[162,591,216],{"class":215},[162,593,594],{"class":175}," jsleaks",[162,596,429],{"class":239},[162,598,599],{"class":239}," -l",[162,601,602],{"class":239}," -k\n",[96,604],{},[106,606,608],{"id":607},"local-storage-audit","Local Storage Audit",[44,610,611],{},"Use DevTools > Application > LocalStorage or run:",[153,613,616],{"code":614,"language":615,"meta":157,"className":158,"style":157},"localStorage.getItem('token')\nsessionStorage.getItem('auth')\n","javascript",[62,617,618,643],{},[162,619,620,624,627,630,633,635,638,640],{"class":164,"line":165},[162,621,623],{"class":622},"snInM","localStorage",[162,625,626],{"class":404},".",[162,628,629],{"class":175},"getItem",[162,631,632],{"class":404},"(",[162,634,212],{"class":205},[162,636,637],{"class":179},"token",[162,639,212],{"class":205},[162,641,642],{"class":404},")\n",[162,644,645,648,650,652,654,656,659,661],{"class":164,"line":172},[162,646,647],{"class":622},"sessionStorage",[162,649,626],{"class":404},[162,651,629],{"class":175},[162,653,632],{"class":404},[162,655,212],{"class":205},[162,657,658],{"class":179},"auth",[162,660,212],{"class":205},[162,662,642],{"class":404},[44,664,665,666,85,668,85,671,85,674,677],{},"Look for: ",[62,667,637],{},[62,669,670],{},"jwt",[62,672,673],{},"role",[62,675,676],{},"user_info",", etc.",[96,679],{},[51,681,683],{"id":682},"bonus-jwt-discovery","Bonus: JWT Discovery",[44,685,686],{},"If you spot this:",[153,688,690],{"code":689,"language":615,"meta":157,"className":158,"style":157},"const token = jwt.sign(payload, 'hardcoded-secret');\n",[62,691,692],{},[162,693,694,697,700,703,706,708,711,713,716,719,721,724,726],{"class":164,"line":165},[162,695,696],{"class":215},"const",[162,698,699],{"class":622}," token",[162,701,702],{"class":404}," =",[162,704,705],{"class":622}," jwt",[162,707,626],{"class":404},[162,709,710],{"class":175},"sign",[162,712,632],{"class":404},[162,714,715],{"class":622},"payload",[162,717,718],{"class":404},",",[162,720,206],{"class":205},[162,722,723],{"class":179},"hardcoded-secret",[162,725,212],{"class":205},[162,727,728],{"class":404},");\n",[44,730,731],{},"You may be able to forge your own token, escalate privileges, or access another user’s data.",[96,733],{},[51,735,737],{"id":736},"automated-js-recon-nuclei","Automated JS Recon (Nuclei)",[153,739,741],{"code":740,"language":156,"meta":157,"className":158,"style":157},"nuclei -l js.txt -t ~\u002Fnuclei-templates\u002Fexposures\u002F -o js_bugs.txt\n",[62,742,743],{},[162,744,745,748,750,752,755,758,760],{"class":164,"line":165},[162,746,747],{"class":175},"nuclei",[162,749,599],{"class":239},[162,751,389],{"class":179},[162,753,754],{"class":239}," -t",[162,756,757],{"class":179}," ~\u002Fnuclei-templates\u002Fexposures\u002F",[162,759,361],{"class":239},[162,761,762],{"class":179}," js_bugs.txt\n",[44,764,765],{},"Or use a loop to download and scan offline:",[153,767,770],{"code":768,"language":769,"meta":157,"className":158,"style":157},"while IFS= read -r link; do\n    wget \"$link\"\ndone \u003C js.txt\ngrep -r -E \"aws_access_key|apikey|secret|token|auth|config|admin\" *.js\n","python",[62,771,772,793,805,821],{},[162,773,774,777,780,783,787,790],{"class":164,"line":165},[162,775,776],{"class":394},"while",[162,778,779],{"class":239}," IFS",[162,781,782],{"class":404},"=",[162,784,786],{"class":785},"sG2Fq"," read ",[162,788,789],{"class":215},"-",[162,791,792],{"class":785},"r link; do\n",[162,794,795,798,800,803],{"class":164,"line":172},[162,796,797],{"class":785},"    wget ",[162,799,274],{"class":205},[162,801,802],{"class":179},"$link",[162,804,421],{"class":205},[162,806,807,810,813,816,818],{"class":164,"line":186},[162,808,809],{"class":785},"done ",[162,811,812],{"class":215},"\u003C",[162,814,815],{"class":785}," js",[162,817,626],{"class":404},[162,819,820],{"class":785},"txt\n",[162,822,823,826,828,831,833,836,838,841,843,846,848],{"class":164,"line":192},[162,824,825],{"class":785},"grep ",[162,827,789],{"class":215},[162,829,830],{"class":785},"r ",[162,832,789],{"class":215},[162,834,835],{"class":785},"E ",[162,837,274],{"class":205},[162,839,840],{"class":179},"aws_access_key|apikey|secret|token|auth|config|admin",[162,842,274],{"class":205},[162,844,845],{"class":215}," *",[162,847,626],{"class":404},[162,849,850],{"class":785},"js\n",[96,852],{},[51,854,856],{"id":855},"wrap-up-recon-toolkit","Wrap-Up: Recon Toolkit",[858,859,860,873],"table",{},[861,862,863],"thead",{},[864,865,866,870],"tr",{},[867,868,869],"th",{},"Tool",[867,871,872],{},"Purpose",[874,875,876,885,893,901,908,915,923],"tbody",{},[864,877,878,882],{},[879,880,881],"td",{},"BurpSuite",[879,883,884],{},"Manual JS harvesting",[864,886,887,890],{},[879,888,889],{},"Wayback",[879,891,892],{},"Historical assets",[864,894,895,898],{},[879,896,897],{},"CDX API",[879,899,900],{},"Deep archive extraction",[864,902,903,905],{},[879,904,474],{},[879,906,907],{},"Endpoint discovery",[864,909,910,912],{},[879,911,553],{},[879,913,914],{},"Secret\u002Ftoken extraction",[864,916,917,920],{},[879,918,919],{},"Grep",[879,921,922],{},"Manual confirmation",[864,924,925,928],{},[879,926,927],{},"Nuclei",[879,929,930],{},"Automated exposure scans",[51,932,933],{"id":933},"conclusion",[44,935,936],{},"And there you have it, the full breakdown of how to hunt down vulnerabilities hiding in JavaScript files.",[44,938,939],{},"From passive recon to active file scraping… from manual grep to full-blown secret and endpoint extraction. This is the recon phase real hunters use to build leads that pay off.",[44,941,942],{},"You’re not just scanning files. You’re reading logic, reverse-engineering patterns, and building the map no one else sees.",[44,944,945,946,949,950,953,954,956,957,961],{},"In ",[116,947,948],{},"Part 2",", we’re going deeper into the code.",[951,952],"br",{},"\nLive debugging. Logic tampering. Obfuscation. Exploits.",[951,955],{},"\nYou’ll see how JavaScript ",[958,959,960],"em",{},"really"," breaks.",[44,963,964],{},"If you found this guide helpful, hit that like, drop a comment, and subscribe for more raw hacker workflow.",[966,967,968],"style",{},"html pre.shiki code .sy60D, html code.shiki .sy60D{--shiki-default:#758575DD;--shiki-light:#A0ADA0}html pre.shiki code .swzfi, html code.shiki .swzfi{--shiki-default:#80A665;--shiki-light:#59873A}html pre.shiki code .sRRDT, html code.shiki .sRRDT{--shiki-default:#C98A7D;--shiki-light:#B56959}html pre.shiki code .s6_DI, html code.shiki .s6_DI{--shiki-default:#B8A965;--shiki-light:#998418}html pre.shiki code .sy_C3, html code.shiki .sy_C3{--shiki-default:#C98A7D77;--shiki-light:#B5695977}html pre.shiki code .sfIIG, html code.shiki .sfIIG{--shiki-default:#CB7676;--shiki-light:#AB5959}html pre.shiki code .se4ZP, html code.shiki .se4ZP{--shiki-default:#C99076;--shiki-light:#A65E2B}html .default .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html.light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html pre.shiki code .sUQhE, html code.shiki .sUQhE{--shiki-default:#4C9A91;--shiki-light:#2F798A}html pre.shiki code .sR8n-, html code.shiki .sR8n-{--shiki-default:#4D9375;--shiki-light:#1E754F}html pre.shiki code .somML, html code.shiki .somML{--shiki-default:#666666;--shiki-light:#999999}html pre.shiki code .snInM, html code.shiki .snInM{--shiki-default:#BD976A;--shiki-light:#B07D48}html pre.shiki code .sG2Fq, html code.shiki .sG2Fq{--shiki-default:#DBD7CAEE;--shiki-light:#393A34}",{"title":157,"searchDepth":186,"depth":186,"links":970},[971,972,977,983,984,985,986],{"id":53,"depth":172,"text":54},{"id":100,"depth":172,"text":101,"children":973},[974,975,976],{"id":108,"depth":186,"text":109},{"id":147,"depth":186,"text":148},{"id":251,"depth":186,"text":252},{"id":369,"depth":172,"text":370,"children":978},[979,980,981,982],{"id":373,"depth":186,"text":374},{"id":473,"depth":186,"text":474},{"id":553,"depth":186,"text":553},{"id":607,"depth":186,"text":608},{"id":682,"depth":172,"text":683},{"id":736,"depth":172,"text":737},{"id":855,"depth":172,"text":856},{"id":933,"depth":172,"text":933},[988,989,990],"Bug Bounty","Linux","Penetration Testing","\u002Fimages\u002Fblog\u002Fjavascript-analysis-masterclass-pt-1\u002Fjs-analysis-masterclass-pt1.webp","2025-05-10","Collecting a target's JavaScript with Burp, the Wayback Machine and the Archive.org CDX API, then analysing it statically for endpoints and secrets.","md",{},"\u002Fjavascript-analysis-masterclass-pt-1",null,{"title":35,"description":993},"javascript-analysis-masterclass-pt-1","2025-05-23","2MMU7zQU_u_dRGLcN_VTiQ6V38OloU0zJa8p7jyc77s",{"older":1003,"newer":1008,"total":1012},{"slug":1004,"title":1005,"date":1006,"position":1007},"inside-the-mind-of-a-million-bug-bounty-hunter-secmeet-0x01","Inside the Mind of a $Million Bug Bounty Hunter | SecMeet 0x01","2025-05-02",33,{"slug":1009,"title":1010,"date":1000,"position":1011},"javascript-analysis-masterclass-pt2","JavaScript Analysis Masterclass - Part 2",31,68,{"id":42,"title":35,"published":1014,"url":1015,"description":1016,"durationSeconds":1017,"viewCount":1018,"thumbnail":1019,"thumbnailSrcset":1020},"2025-05-12T15:00:49Z","https:\u002F\u002Fwww.youtube.com\u002Fwatch?v=WnUGRaaDHGw","JavaScript is everywhere — but most bug bounty hunters don’t look deep enough. In this video, I’m pulling back the curtain on one of the most overlooked attack surfaces in modern web applications: JavaScript files.",1740,8039,"\u002Fimages\u002Fvideos\u002FWnUGRaaDHGw-800.webp","\u002Fimages\u002Fvideos\u002FWnUGRaaDHGw-800.webp 800w, \u002Fimages\u002Fvideos\u002FWnUGRaaDHGw-1280.webp 1280w",{"left":12,"top":12,"width":13,"height":13,"rotate":12,"vFlip":14,"hFlip":14,"body":1022},"\u003Cg fill=\"none\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2\">\u003Cpath d=\"M7 9.667A2.667 2.667 0 0 1 9.667 7h8.666A2.667 2.667 0 0 1 21 9.667v8.666A2.667 2.667 0 0 1 18.333 21H9.667A2.667 2.667 0 0 1 7 18.333z\"\u002F>\u003Cpath d=\"M4.012 16.737A2 2 0 0 1 3 15V5c0-1.1.9-2 2-2h10c.75 0 1.158.385 1.5 1\"\u002F>\u003C\u002Fg>",1791941261182]