Headline
GHSA-w765-jm6w-4hhj: Webrecorder packages are vulnerable to XSS through 404 error handling logic
A Reflected Cross-Site Scripting (XSS) vulnerability exists in the 404 error handling logic of wabac.js v2.23.10 and below. The parameter requestURL (derived from the original request target) is directly embedded into an inline <script> block without sanitization or escaping.
This allows an attacker to craft a malicious URL that executes arbitrary JavaScript in the victim’s browser.
The scope may be limited by CORS policies, depending on the situation in which wabac.js is used.
Patches
The vulnerability is fixed in wabac.js v2.23.11.
Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.