CVE-2026-30889

Discourse has Unauthorized Post Data Exposure in discourse-user-notes

State: Published
Severity: 5.3 Medium
Published: Mar 20, 2026
Updated: Mar 20, 2026
Reserved: Mar 6, 2026

Description

Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, a moderator could exploit insufficient authorization checks to access metadata of posts they should not have permission to view. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch.

Scores

CVSS	Score	Vector	Source
4.0	5.3 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N	GitHub_M

Weaknesses

CWE-862 Missing Authorization

Affected Products

Product	Versions
discoursediscourse	>= 2026.1.0-latest, < 2026.1.2Affected >= 2026.2.0-latest, < 2026.2.1Affected = 2026.3.0-latest.1Affected

References

https://github.com/discourse/discourse/security/advisories/GHSA-5qm9-r98f-g4mq

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