Description
Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, a type coercion issue in a post actions API endpoint allowed non-staff users to issue warnings to other users. Warnings are a staff-only moderation feature. The vulnerability required the attacker to be a logged-in user and to send a specifically crafted request. No data exposure or privilege escalation beyond the ability to create unauthorized user warnings was possible. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch. No known workarounds are available.
Problem types
CWE-862: Missing Authorization
Product status
>= 2026.2.0-latest, < 2026.2.1
= 2026.3.0-latest
References
github.com/...course/security/advisories/GHSA-xq37-5fvf-4m4j
github.com/...ommit/60a588f4da4ab0feceb2c44787d4261b4f8757be
github.com/...ommit/d3cb203feabc46d765ecb91f348613a2bd531b89
github.com/...ommit/f5fef73827da7520efc517357bd2a6bab35d7886