CVE-2025-11776CWE-863broken-access-control

CVE-2025-11776

Medium · published November 14, 2025

CVSS v3.1
4.3
EPSS
0%
Percentile
10.3
In the wild
Unconfirmed
What it is

Mattermost versions <11 fail to properly restrict access to archived channel search API which allows guest users to discover archived public channels via the `/api/v4/teams/{team_id}/channels/search_archived` endpoint

The record
Technical detail
CVSS v3.1
4.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00208 · 10.3th percentile
Weakness
CWE-863 · Incorrect Authorization
Published
2025-11-14T13:15Z
Affected products (1)
ProductVersionsFixed in
mattermost/mattermost_server< 11.0.011.0.0
References (1)
https://mattermost.com/security-updates · [email protected]
EPSS history
Timeline
  • 14 NOV 07:58Z
    Guest user can discover archived public channels
    cvelistv5