Summary

It was confirmed in a test environment that an attacker can store an HTML/JavaScript payload in a repository’s Milestone name, and when another user selects that Milestone on the New Issue page (/issues/new), a DOM-Based XSS is triggered.

Impact

• Theft of information accessible in the victim’s session.
• Extraction of CSRF tokens and submission of state-changing requests with the victim’s privileges.
• Repository operations performed with the victim’s privileges (Issue operations, settings changes, etc.).

(The impact scope depends on the victim’s permission level.)

Remediation

A fix is available at https://github.com/gogs/gogs/releases/tag/v0.14.2