CVE-2025-27571

MEDIUM

Mattermost 9.11.0-9.11.9, 10.4.0-10.4.3, 10.5.0-10.5.1 - Incorrect Authorization in Archived Channel Metadata

Title source: llm
STIX 2.1

Description

Mattermost versions 10.5.x <= 10.5.1, 10.4.x <= 10.4.3, 9.11.x <= 9.11.9 fail to check the "Allow Users to View Archived Channels" configuration when fetching channel metadata of a post from archived channels, which allows authenticated users to access such information when a channel is archived.

References (1)

Core 1
Core References

Scores

CVSS v3 4.3
EPSS 0.0018
EPSS Percentile 39.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-863
Status published
Products (2)
mattermost/mattermost 10.5.0 - 10.5.2Go
mattermost/mattermost_server 9.11.0 - 9.11.10
Published Apr 16, 2025
Tracked Since Feb 18, 2026