CVE-2026-21865
Published: Jan 28, 2026
Modified: Jan 28, 2026
CVSS v3.1
6.5
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.
| Vendor | Product | Versions |
|---|---|---|
discourse | discourse | affected < 3.5.4affected >= 2025.11.0-latest, < 2025.11.2affected >= 2025.12.0-latest, < 2025.12.1affected >= 2026.1.0-latest, < 2026.1.0 |
Weaknesses (CWE)
CVSS v3.1 Details
CVSS v3.1 Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
References
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