CVE-2025-35965

MEDIUM

Mattermost 9.11.0-9.11.10, 10.4.0-10.4.2, 10.5.0 - Denial of Service via UpdateRunTaskActions GraphQL Operation

Title source: llm

Description

Mattermost versions 10.4.x <= 10.4.2, 10.5.x <= 10.5.0, 9.11.x <= 9.11.10 fail to validate the uniqueness and quantity of task actions within the UpdateRunTaskActions GraphQL operation, which allows an attacker to create task items containing an excessive number of actions triggered by specific posts, overloading the server and leading to a denial-of-service (DoS) condition.

References (1)

Core 1

Core References

Vendor Advisory

https://mattermost.com/security-updates

Scores

CVSS v3 6.5

EPSS 0.0034

EPSS Percentile 56.6%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-770

Status published

Products (4)

mattermost/mattermost 0 - 8.0.0-20250218121836-2b5275d87136Go

mattermost/mattermost-plugin-playbooks 2.0.0Go

mattermost/mattermost_server 10.5.0

mattermost/mattermost_server 9.11.0 - 9.11.11

Published Apr 24, 2025

Tracked Since Feb 18, 2026