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CVE-2026-21865: Missing Authorization

🗓️ 28 Jan 2026 00:00:00Reported by Rapid7Type 
rapid7
 rapid7
🔗 www.rapid7.com👁 4 Views

Discourse prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0 allows moderators unauthorized access.

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Refs
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attackerkb
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CVE-2026-21865
28 Jan 202619:51
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CVE-2026-21865
28 Jan 202619:51
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cvelist
Cvelist
CVE-2026-21865 Discourse topic conversion permission vulnerability for moderators
28 Jan 202619:51
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euvd
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EUVD-2026-4874
28 Jan 202619:51
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mend
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CVE-2026-21865
28 Jan 202619:51
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nvd
NVD
CVE-2026-21865
28 Jan 202620:16
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osv_bit
osv_bit
BIT-DISCOURSE-2026-21865 Discourse topic conversion permission vulnerability for moderators
2 Feb 202608:42
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ptsecurity
Positive Technologies
PT-2026-5210
28 Jan 202600:00
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redhatcve
RedhatCVE
CVE-2026-21865
29 Jan 202621:21
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30 Jan 2026 00:00Current
5.4Medium risk
Vulners AI Score5.4
CVSS 3.16.5
EPSS0.00258
SSVC
4