CVE-2026-30889

MEDIUM

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

Title source: cna
STIX 2.1

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.

References (1)

Core 1
Core References

Scores

CVSS v3 4.9
EPSS 0.0002
EPSS Percentile 4.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-862
Status published
Products (5)
discourse/discourse 2026.3.0
discourse/discourse 2026.1.0 - 2026.1.2
discourse/discourse = 2026.3.0-latest.1
discourse/discourse >= 2026.1.0-latest, < 2026.1.2
discourse/discourse >= 2026.2.0-latest, < 2026.2.1
Published Mar 20, 2026
Tracked Since Mar 20, 2026