CVE-2025-6226CWE-306

IDOR in CreatePost API allows for timeboxed message disclosure

Medium · published July 18, 2025

CVSS v3.1
6.5
EPSS
0%
Percentile
29.9
In the wild
Unconfirmed
What it is

Mattermost versions 10.5.x <= 10.5.6, 10.8.x <= 10.8.1, 10.7.x <= 10.7.3, 9.11.x <= 9.11.16 fail to verify authorization when retrieving cached posts by PendingPostID which allows an authenticated user to read posts in private channels they don't have access to via guessing the PendingPostID of recently created posts.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00371 · 29.9th percentile
Weakness
CWE-306 · Missing Authentication for Critical Function
Published
2025-07-18T08:48Z
EPSS history
Timeline
  • 18 JUL 08:48Z
    IDOR in CreatePost API allows for timeboxed message disclosure
    cvelistv5