Gogs Supply Chain and XSS Attacks

Supply chain attack via LFS object overwrite across repos in Gogs before 0.14.2. PoC and patch available.

Stored XSS in Gogs prior to version 0.14.2 allows authenticated users to execute arbitrary JavaScript in comments and issue descriptions by exploiting the HTML sanitizer's allowance of data: URI schemes. This affects all users viewing malicious content within the same Gogs instance and could enable session hijacking or credential theft. Public exploit code exists for this vulnerability, though a patch is available in version 0.14.2 and later.

Gogs versions prior to 0.14.2 contain a DOM-based XSS vulnerability in the Issue creation page where attackers can inject malicious scripts through milestone names that execute when other users interact with those milestones. An authenticated attacker can craft a repository with a malicious milestone name containing JavaScript payloads that trigger in victim browsers, potentially compromising user sessions or sensitive data. No patch is currently available for affected versions.

Gogs prior to version 0.14.2 contains a command injection vulnerability in release deletion functionality where improper handling of user-controlled tag names allows git options to be injected into git commands. An authenticated attacker with UI interaction can exploit this to achieve integrity and availability impacts. Public exploit code exists for this vulnerability.

Stored cross-site scripting in Gogs prior to version 0.14.2 allows unauthenticated attackers to inject malicious scripts through template rendering of user-controlled data, potentially affecting all users viewing compromised content. The vulnerability exploits unsafe handling of data URLs combined with permissive sanitization, enabling attackers to steal session cookies, deface pages, or perform actions on behalf of victims. A patch is available in version 0.14.2 and later.