CVE-2025-35965: Mattermost Playbooks fails to validate the uniqueness and quantity of task actions

CVE-2025-35965 · Severity: low · CVSS 3.1 · Published 2025-04-24

Mattermost Playbooks fails to validate the uniqueness and quantity of task actions in github.com/mattermost/mattermost-plugin-playbooks

Technologies: github.com/mattermost/mattermost-plugin-playbooks (Go), github.com/mattermost/mattermost-server (Go), github.com/mattermost/mattermost-server/v5 (Go), github.com/mattermost/mattermost-server/v6 (Go), github.com/mattermost/mattermost/server/v8 (Go). Vendors: Go.

Quick answers

Is CVE-2025-35965 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2025-35965 being exploited in the wild.
How severe is CVE-2025-35965?
Low severity, with a CVSS score of 3.1, published 24 April 2025.
Which products and versions are affected?
github.com/mattermost/mattermost-plugin-playbooks (Go) SEMVER:introduced=0, SEMVER:introduced=2.0.0; github.com/mattermost/mattermost-server (Go) SEMVER:introduced=9.11.0+incompatible; github.com/mattermost/mattermost-server/v5 (Go) SEMVER:introduced=0; github.com/mattermost/mattermost-server/v6 (Go) SEMVER:introduced=0; and 1 more.
Is there a fix for CVE-2025-35965?
Yes. github.com/mattermost/mattermost/server/v8 (Go): upgrade to 8.0.0-20250218121836-2b5275d87136 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2025-35965?
Check whether you run github.com/mattermost/mattermost-plugin-playbooks (Go), github.com/mattermost/mattermost-server (Go), github.com/mattermost/mattermost-server/v5 (Go) or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • github.com/mattermost/mattermost/server/v8 (Go): upgrade to 8.0.0-20250218121836-2b5275d87136 or later
    go get github.com/mattermost/mattermost/server/v8@v8.0.0-20250218121836-2b5275d87136

Affected products

  • github.com/mattermost/mattermost-plugin-playbooks (Go) SEMVER:introduced=0, SEMVER:introduced=2.0.0
  • github.com/mattermost/mattermost-server (Go) SEMVER:introduced=9.11.0+incompatible
  • github.com/mattermost/mattermost-server/v5 (Go) SEMVER:introduced=0
  • github.com/mattermost/mattermost-server/v6 (Go) SEMVER:introduced=0
  • github.com/mattermost/mattermost/server/v8 (Go) SEMVER:introduced=0, SEMVER:introduced=0,fixed=8.0.0-20250218121836-2b5275d87136

Identifiers

  • CVE-2025-35965
  • GHSA-689c-xq7x-xjwf
  • GO-2025-3643

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.