Discourse is an open source discussion platform. In versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0, moderators can convert some personal messages to public topics when they shouldn't have access. This issue is patched in versions 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0. As a workaround, site admin can temporarily revoke the moderation role from untrusted moderators or remove the moderator group from the "personal message enabled groups" site setting until the Discourse instance has been upgraded to a version that has been patched.
References
| Link | Resource |
|---|---|
| https://github.com/discourse/discourse/security/advisories/GHSA-4777-wrv5-3g39 | Third Party Advisory |
Configurations
Configuration 1 (hide)
|
History
30 Jan 2026, 20:30
| Type | Values Removed | Values Added |
|---|---|---|
| CPE | cpe:2.3:a:discourse:discourse:2026.1.0:*:*:*:stable:*:*:* cpe:2.3:a:discourse:discourse:*:*:*:*:stable:*:*:* cpe:2.3:a:discourse:discourse:2025.12.0:*:*:*:stable:*:*:* |
|
| References | () https://github.com/discourse/discourse/security/advisories/GHSA-4777-wrv5-3g39 - Third Party Advisory | |
| First Time |
Discourse
Discourse discourse |
28 Jan 2026, 20:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-01-28 20:16
Updated : 2026-01-30 20:30
NVD link : CVE-2026-21865
Mitre link : CVE-2026-21865
CVE.ORG link : CVE-2026-21865
JSON object : View
Products Affected
discourse
- discourse
CWE
CWE-862
Missing Authorization