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.
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Affected Vendors & Products
References
History
Wed, 28 Jan 2026 20:15:00 +0000
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ssvc
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Wed, 28 Jan 2026 20:00:00 +0000
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| 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 |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: GitHub_M
Published:
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 : Received
Published: 2026-01-28T20:16:14.530
Modified: 2026-01-28T20:16:14.530
Link: CVE-2026-21865
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OpenCVE Enrichment
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