Denial-of-Service Vulnerability in Mattermost by Mattermost, Inc.
CVE-2025-35965

6.5MEDIUM

Key Information:

Vendor

Mattermost
Status
Mattermost
Vendor
CVE Published:
24 April 2025

What is CVE-2025-35965?

Mattermost versions 10.4.x up to 10.4.2, 10.5.x up to 10.5.0, and 9.11.x up to 9.11.10 lack sufficient validation of task actions during the UpdateRunTaskActions GraphQL operation. This flaw enables an attacker to generate excessive task items through specific posts, leading to potential server overload and service disruptions.

Affected Version(s)

Mattermost 10.4.0 <= 10.4.2

Mattermost 10.5.0

Mattermost 9.11.0 <= 9.11.10

References

https://mattermost.com/security-updates

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

vultza (vultza)
.
CVE-2025-35965 : Denial-of-Service Vulnerability in Mattermost by Mattermost, Inc.