CVE-2026-33428CWE-863

Discourse Allows Unauthorized Access to Deleted Posts Index via Group Membership

Medium · published March 20, 2026

CVSS v4.0
4.9
EPSS
0%
Percentile
27.8
In the wild
Unconfirmed
What it is

Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, a non-staff user with elevated group membership could access deleted posts belonging to any user due to an overly broad authorization check on the deleted posts index endpoint. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch. No known workarounds are available.

The record
Technical detail
CVSS v4.0
4.9 · MEDIUM
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U
EPSS
0.00354 · 27.8th percentile
Weakness
CWE-863 · Incorrect Authorization
Published
2026-03-20T23:21Z
EPSS history
Timeline
  • 20 MAR 23:21Z
    Discourse Allows Unauthorized Access to Deleted Posts Index via Group Membership
    cvelistv5