CVE-2025-13523: Mattermost Confluence plugin doesn't properly escape user-controlled display names in HTML template rendering

CVE-2025-13523 · Severity: low · CVSS 3.1 · Published 2026-02-17

Mattermost Confluence plugin doesn't properly escape user-controlled display names in HTML template rendering in github.com/mattermost/mattermost-plugin-confluence

Technologies: github.com/mattermost/mattermost-plugin-confluence (Go). Vendors: Go.

Quick answers

Is CVE-2025-13523 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2025-13523 being exploited in the wild.
How severe is CVE-2025-13523?
Low severity, with a CVSS score of 3.1, published 17 February 2026.
Which products and versions are affected?
github.com/mattermost/mattermost-plugin-confluence (Go) SEMVER:introduced=0,fixed=1.7.0.
Is there a fix for CVE-2025-13523?
Yes. github.com/mattermost/mattermost-plugin-confluence (Go): upgrade to 1.7.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2025-13523?
Check whether you run github.com/mattermost/mattermost-plugin-confluence (Go) 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-confluence (Go): upgrade to 1.7.0 or later
    go get github.com/mattermost/mattermost-plugin-confluence@v1.7.0

Affected products

  • github.com/mattermost/mattermost-plugin-confluence (Go) SEMVER:introduced=0,fixed=1.7.0

Identifiers

  • CVE-2025-13523
  • GHSA-ffx7-34p2-vm3w
  • GO-2026-4456

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