Permission Validation Flaw in Mattermost API
CVE-2025-2527

4.3MEDIUM

Key Information:

Vendor

Mattermost
Status
Mattermost
Vendor
CVE Published:
15 May 2025

What is CVE-2025-2527?

A significant access control vulnerability exists in Mattermost versions 10.5.x (up to and including 10.5.2) and 9.11.x (up to and including 9.11.11). This issue arises from the application's failure to adequately verify user permissions when attempting to access group information via the API. As a result, attackers can exploit this flaw to retrieve sensitive group details without the necessary permissions, potentially leading to unauthorized information exposure and privacy violations.

Affected Version(s)

Mattermost 10.5.0 <= 10.5.2

Mattermost 9.11.0 <= 9.11.11

Mattermost 10.7.0

References

https://mattermost.com/security-updates

CVSS V3.1

Score:
4.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Ben Cooke
.