Gogs Path Traversal and XSS Vulnerabilities

CVE-2024-56731 is a critical remote code execution vulnerability in Gogs (self-hosted Git service) versions prior to 0.13.3, where unprivileged users can delete files in the .git directory and achieve arbitrary command execution due to an incomplete patch of CVE-2024-39931. An unauthenticated remote attacker can execute arbitrary commands with the privileges of the RUN_USER account, compromising all code repositories and user data on affected instances. This represents an actively exploitable vulnerability with a perfect CVSS 3.1 score of 10.0 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H), indicating network accessibility, low attack complexity, no privilege requirements, and complete system compromise.

Gogs is an open source self-hosted Git service. In application version 0.14.0+dev and prior, there is a stored cross-site scripting (XSS) vulnerability present in Gogs, which allows client-side Javascript code execution. The vulnerability is caused by the usage of a vulnerable and outdated component: pdfjs-1.4.20 under public/plugins/. This issue has been fixed for gogs.io/gogs in version 0.13.3.