CVE-2026-33415CWE-284

Discourse: Improper Access Control in discourse-ai Allows Unauthorized Category Content Exposure

Medium · published March 31, 2026

CVSS v4.0
5.1
EPSS
0%
Percentile
23.1
In the wild
Unconfirmed
What it is

Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.3, 2026.2.0-latest to before 2026.2.2, and 2026.3.0-latest to before 2026.3.0, an authenticated moderator-level user could retrieve post content, topic titles, and usernames from categories they were not authorized to view. Insufficient access controls on a sentiment analytics endpoint allowed category permission boundaries to be bypassed. This issue has been patched in versions 2026.1.3, 2026.2.2, and 2026.3.0.

The record
Technical detail
CVSS v4.0
5.1 · MEDIUM
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
EPSS
0.00315 · 23.1th percentile
Weakness
CWE-284 · Improper Access Control
Published
2026-03-31T17:42Z
EPSS history
Timeline
  • 31 MAR 17:42Z
    Discourse: Improper Access Control in discourse-ai Allows Unauthorized Category Content Exposure
    cvelistv5