CVE-2025-2527

MEDIUM

Mattermost 9.11.0-9.11.11 and 10.5.0-10.5.2 - Incorrect Authorization via Group API

Title source: llm

Description

Mattermost versions 10.5.x <= 10.5.2, 9.11.x <= 9.11.11 failed to properly verify a user's permissions when accessing groups, which allows an attacker to view group information via an API request.

References (1)

Core 1

Core References

Vendor Advisory

https://mattermost.com/security-updates

Scores

CVSS v3 4.3

EPSS 0.0017

EPSS Percentile 37.7%

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 - 10.5.3Go

mattermost/mattermost_server 9.11.0 - 9.11.12

Published May 15, 2025

Tracked Since Feb 18, 2026