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Security Advisories

CVE-2025-35965

NVD

https://nvd.nist.gov/vuln/detail/CVE-2025-35965

Severity

6.5

Medium

CVSS V3

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Summary

DoS in Mattermost Playbooks via Excessive Task Actions

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

  • https://nvd.nist.gov/vuln/detail/CVE-2025-35965
  • https://github.com/advisories/GHSA-689c-xq7x-xjwf
  • https://pkg.go.dev/vuln/GO-2025-3643
  • https://mattermost.com/security-updates
  • https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/35xxx/CVE-2025-35965.json

Affected packages

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