Access Control Vulnerability in Mattermost by Mattermost Inc.
CVE-2025-49810

3.5LOW

Key Information:

Vendor

Mattermost
Status
Mattermost
Vendor
CVE Published:
21 August 2025

What is CVE-2025-49810?

The Mattermost platform, specifically versions 10.5.0 to 10.5.8, has a significant flaw in its access control mechanisms. This vulnerability enables unauthorized users to read threads via AI posts, potentially exposing sensitive information and compromising user privacy. It is essential for administrators and users of affected Mattermost versions to take immediate action by applying the latest security updates to mitigate this risk.

Affected Version(s)

Mattermost 10.5.0 <= 10.5.8

Mattermost 10.10.0

Mattermost 10.5.9

References

https://mattermost.com/security-updates

CVSS V3.1

Score:
3.5
Severity:
LOW
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Juho Forsén
.