CVE-2025-14273: Mattermost with Jira plugin enabled has Incorrect Implementation of Authentication Algorithm

CVE-2025-14273 · Severity: high · CVSS 7.2 · Published 2025-12-22

Mattermost versions 11.1.x <= 11.1.0, 11.0.x <= 11.0.5, 10.12.x <= 10.12.3, 10.11.x <= 10.11.7 with the Jira plugin enabled and Mattermost Jira plugin versions <=4.4.0 fail to enforce authentication and issue-key path restrictions in the Jira plugin, which allows an unauthenticated attacker who knows a valid user ID to issue authenticated GET and POST requests to the Jira server via crafted plugin payloads that spoof the user ID and inject arbitrary issue key paths. Mattermost Advisory ID: MMSA-2025-00555

Technologies: github.com/mattermost/mattermost-plugin-jira (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), Mattermost Server. Vendors: Go, Mattermost.

Quick answers

Is CVE-2025-14273 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2025-14273 being exploited in the wild.
How severe is CVE-2025-14273?
High severity, with a CVSS score of 7.2, published 22 December 2025.
Which products and versions are affected?
github.com/mattermost/mattermost-plugin-jira (Go) SEMVER:introduced=0, SEMVER:introduced=0,fixed=4.4.1; github.com/mattermost/mattermost-server (Go) SEMVER:introduced=0; 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-2025-14273?
Yes. github.com/mattermost/mattermost-plugin-jira (Go): upgrade to 4.4.1 or later; github.com/mattermost/mattermost/server/v8 (Go): upgrade to 8.0.0-20251121122154-b57c297c6d7a or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2025-14273?
Check whether you run github.com/mattermost/mattermost-plugin-jira (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-plugin-jira (Go): upgrade to 4.4.1 or later
    go get github.com/mattermost/mattermost-plugin-jira@v4.4.1
  • github.com/mattermost/mattermost/server/v8 (Go): upgrade to 8.0.0-20251121122154-b57c297c6d7a or later
    go get github.com/mattermost/mattermost/server/v8@v8.0.0-20251121122154-b57c297c6d7a

Affected products

  • github.com/mattermost/mattermost-plugin-jira (Go) SEMVER:introduced=0, SEMVER:introduced=0,fixed=4.4.1
  • github.com/mattermost/mattermost-server (Go) SEMVER:introduced=0
  • 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,fixed=8.0.0-20251121122154-b57c297c6d7a
  • Mattermost Server

Identifiers

  • CVE-2025-14273
  • GHSA-qvmc-92vg-6r35
  • GO-2026-4275

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