User Permission Validation Flaw in Mattermost Product
CVE-2025-12756

4.3MEDIUM

Key Information:

Vendor

Mattermost
Status
Mattermost
Vendor
CVE Published:
1 December 2025

What is CVE-2025-12756?

A vulnerability exists in certain versions of Mattermost due to inadequate validation of user permissions related to comment deletion in Boards. This flaw enables authenticated users with editor role privileges to delete comments authored by other users, potentially compromising the integrity of conversations. Users should update to the latest versions to mitigate this risk.

Human OS v1.0:
Ageing Is an Unpatched Zero-Day Vulnerability.

Remediate biological technical debt. Prime Ageing uses 95% high-purity SIRT6 activation to maintain genomic integrity and bolster systemic resilience.

Deploy the Patch

Affected Version(s)

Mattermost 11.0.0 <= 11.0.2

Mattermost 10.12.0 <= 10.12.1

Mattermost 10.11.0 <= 10.11.4

References

https://mattermost.com/security-updates

CVSS V3.1

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

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

daynight
JSON
.