iscourse 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.
| Link | Resource |
|---|---|
| https://github.com/discourse/discourse/security/advisories/GHSA-4777-wrv5-3g39 | Third Party Advisory |
Configuration 1 (hide)
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30 Jan 2026, 20:30
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Discourse discourse
Discourse |
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| References | () https://github.com/discourse/discourse/security/advisories/GHSA-4777-wrv5-3g39 - Third Party Advisory | |
| CPE | cpe:2.3:a:discourse:discourse:*:*:*:*:stable:*:*:* cpe:2.3:a:discourse:discourse:2026.1.0:*:*:*:stable:*:*:* cpe:2.3:a:discourse:discourse:2025.12.0:*:*:*:stable:*:*:* |
28 Jan 2026, 20:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
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
Missing Authorization