CVE-2025-47871CWE-863

Mattermost Playbooks exposes private channel metadata to unauthorized users via run metadata API

Medium · published June 30, 2025

CVSS v3.1
4.3
EPSS
0%
Percentile
9.7
In the wild
Unconfirmed
What it is

Mattermost versions 10.5.x <= 10.5.5, 9.11.x <= 9.11.15, 10.8.x <= 10.8.0, 10.7.x <= 10.7.2, 10.6.x <= 10.6.5 fail to properly validate channel membership when retrieving playbook run metadata, allowing authenticated users who are playbook members but not channel members to access sensitive information about linked private channels including channel name, display name, and participant count through the run metadata API 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:N/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00202 · 9.7th percentile
Weakness
CWE-863 · Incorrect Authorization
Published
2025-06-30T16:51Z
EPSS history
Timeline
  • 30 JUN 16:51Z
    Mattermost Playbooks exposes private channel metadata to unauthorized users via run metadata API
    cvelistv5