[Duplicate] Reflected XSS in Import Map Overrides Enables Account Takeover
A reflected XSS vulnerability in the import map overrides feature allows attackers to execute arbitrary JavaScript in authenticated user contexts, risking account takeover and credential theft.
Summary
A reflected cross-site scripting (XSS) vulnerability was discovered in the import map overrides feature of a web application. This flaw allows attackers to execute arbitrary JavaScript in the context of an authenticated user, potentially leading to account takeover and credential theft.
Affected Component
The vulnerability resides in the import map overrides feature, specifically in the handling of the imo GET parameter.
Root Cause
The root cause of this vulnerability is the application's failure to sanitize or validate the imo GET parameter, which is used to override JavaScript modules. The application directly incorporates attacker-controlled input into the page's execution context without applying security controls such as Content Security Policy (CSP). This oversight allows attackers to inject and execute arbitrary JavaScript code.