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CVE-2025-35965

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Date: April 24, 2025

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.

Severity Score

Related Resources (7)

https://github.com/mattermost/mattermost/commit/2b5275d87136f07e016c8eca09a2f004b31afc8a
https://nvd.nist.gov/vuln/detail/CVE-2025-35965
https://github.com/mattermost/mattermost-plugin-playbooks
https://github.com/mattermost/mattermost-plugin-playbooks/commit/bf2633dad09f5768ce2bea4b7c5ffb74050052a8
https://github.com/advisories/GHSA-689c-xq7x-xjwf
https://mattermost.com/security-updates
https://www.mend.io/vulnerability-database/CVE-2025-35965

Severity Score

Weakness Type (CWE)

Allocation of Resources Without Limits or Throttling

CWE-770

Top Fix

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Upgrade Version

Upgrade to version github.com/mattermost/mattermost/server/v8 - v8.0.0-20250218121836-2b5275d87136;github.com/mattermost/mattermost-plugin-playbooks - v1.41.0;https://github.com/mattermost/mattermost-plugin-playbooks.git - v1.41.0;https://github.com/mattermost/mattermost-plugin-playbooks.git - v2.1.1

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

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