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.
Metrics
Affected Vendors & Products
References
History
Fri, 30 Jan 2026 20:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| CPEs | cpe:2.3:a:discourse:discourse:*:*:*:*:stable:*:*:* cpe:2.3:a:discourse:discourse:2025.12.0:*:*:*:stable:*:*:* cpe:2.3:a:discourse:discourse:2026.1.0:*:*:*:stable:*:*:* |
Thu, 29 Jan 2026 10:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Discourse
Discourse discourse |
|
| Vendors & Products |
Discourse
Discourse discourse |
Wed, 28 Jan 2026 20:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Wed, 28 Jan 2026 20:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | Discourse topic conversion permission vulnerability for moderators | |
| Weaknesses | CWE-862 | |
| References |
| |
| Metrics |
cvssV3_1
|
Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-01-28T19:51:37.991Z
Updated: 2026-01-28T20:10:06.915Z
Reserved: 2026-01-05T16:44:16.368Z
Link: CVE-2026-21865
Updated: 2026-01-28T20:09:49.084Z
Status : Analyzed
Published: 2026-01-28T20:16:14.530
Modified: 2026-01-30T20:30:18.947
Link: CVE-2026-21865
No data.