Executive brief
GazellePW is an open-source web application for managing bonus systems and user roles. A stored cross-site scripting (XSS) vulnerability in the custom bonus title feature allows authenticated users to inject malicious JavaScript code that persists in the database and executes when other users view the affected pages, potentially enabling account takeover, session theft, or unauthorized actions.
Technical details
This is a stored XSS vulnerability in GazellePW's custom bonus title feature, affecting the `/bonus.php` and `/user.php?action=staff_tool` endpoints. The vulnerability exists because user-supplied input via the title parameter is not properly sanitized before being stored in the database and rendered in HTML context. An authenticated attacker can inject arbitrary JavaScript that will execute in the browsers of any user who views the stored payload. No special privileges are required beyond basic authentication; the vulnerability requires an attacker to have a valid account but does not require admin status. Patches should sanitize all user input and apply proper output encoding.
Affected products
- GazellePW GazellePW commit 86c4bedf727691b5a97af42a4864869d18446449 and earlier
Timeline
- 2026-08-25: disclosed