CVE-2025-22601: Discourse

Low severity, CVSS 3.1. EPSS: 0.4% chance of exploitation in the next 30 days.

Discourse is an open source platform for community discussion. In affected versions an attacker can trick a target user to make changes to their own username via carefully crafted link using the `activate-account` route. This problem has been patched in the latest version of Discourse. Users are advised to upgrade. There are no known workarounds for this vulnerability.

Affected products

• Discourse Discourse: before 3.4.0 (fixed in 3.4.0); version 3.4.0 only

Published 2025-02-04. Last modified 2026-06-17.