# CVE-2025-13324: Mattermost has an Invite Token Replay Vulnerability via Channel Membership Manipulation

Source: https://junglewise.ai/threats/cve-2025-13324-mattermost-has-an-invite-token-replay-vulnerability-via-channel  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-12-17  
License: CC BY 4.0 with a link back

CVE-2025-13324 · Severity: low · CVSS 3.7 · Published 2025-12-17

Mattermost versions 10.11.x <= 10.11.5, 11.0.x <= 11.0.4, 10.12.x <= 10.12.2 fail to invalidate remote cluster invite tokens when using the legacy (version 1) protocol or when the confirming party does not provide a refreshed token, which allows an attacker who has obtained an invite token to authenticate as the remote cluster and perform limited actions on shared channels even after the invitation has been legitimately confirmed.

Technologies: [github.com/mattermost/mattermost (Go)](https://junglewise.ai/threats/technologies/github-com-mattermost-mattermost), [github.com/mattermost/mattermost-server (Go)](https://junglewise.ai/threats/technologies/github-com-mattermost-mattermost-server), [github.com/mattermost/mattermost-server/v5 (Go)](https://junglewise.ai/threats/technologies/github-com-mattermost-mattermost-server-v5), [github.com/mattermost/mattermost-server/v6 (Go)](https://junglewise.ai/threats/technologies/github-com-mattermost-mattermost-server-v6), [github.com/mattermost/mattermost/server/v8 (Go)](https://junglewise.ai/threats/technologies/github-com-mattermost-mattermost-server-v8), [Mattermost Server](https://junglewise.ai/threats/technologies/server-public). Vendors: [Go](https://junglewise.ai/threats/vendors/go), [Mattermost](https://junglewise.ai/threats/vendors/mattermost).

## Quick answers

**Is CVE-2025-13324 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-13324 being exploited in the wild.

**How severe is CVE-2025-13324?** Low severity, with a CVSS score of 3.7, published 17 December 2025.

**Which products and versions are affected?** github.com/mattermost/mattermost (Go) SEMVER:introduced=10.11.0-rc1+incompatible,fixed=10.11.5+incompatible,introduced=10.12.0+incompatible,fixed=10.12.2+incompatible,introduced=11.0.0-alpha.1+incompatible,fixed=11.0.4+incompatible, SEMVER:introduced=10.12.0,fixed=10.12.2; github.com/mattermost/mattermost-server (Go) SEMVER:introduced=0,fixed=11.0.4, SEMVER:introduced=0,fixed=11.0.4+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-2025-13324?** Yes. github.com/mattermost/mattermost (Go): upgrade to 10.12.2, 11.0.4+incompatible or later; github.com/mattermost/mattermost-server (Go): upgrade to 11.0.4, 11.0.4+incompatible or later; github.com/mattermost/mattermost/server/v8 (Go): upgrade to 8.0.0-20251031095924-e7e23b94e006 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2025-13324?** Check whether you run github.com/mattermost/mattermost (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 (Go): upgrade to 10.12.2, 11.0.4+incompatible or later

  ```sh
  go get github.com/mattermost/mattermost@v11.0.4+incompatible
  ```

- github.com/mattermost/mattermost-server (Go): upgrade to 11.0.4, 11.0.4+incompatible or later

  ```sh
  go get github.com/mattermost/mattermost-server@v11.0.4+incompatible
  ```

- github.com/mattermost/mattermost/server/v8 (Go): upgrade to 8.0.0-20251031095924-e7e23b94e006 or later

  ```sh
  go get github.com/mattermost/mattermost/server/v8@v8.0.0-20251031095924-e7e23b94e006
  ```


## Affected products

- github.com/mattermost/mattermost (Go) SEMVER:introduced=10.11.0-rc1+incompatible,fixed=10.11.5+incompatible,introduced=10.12.0+incompatible,fixed=10.12.2+incompatible,introduced=11.0.0-alpha.1+incompatible,fixed=11.0.4+incompatible, SEMVER:introduced=10.12.0,fixed=10.12.2
- github.com/mattermost/mattermost-server (Go) SEMVER:introduced=0,fixed=11.0.4, SEMVER:introduced=0,fixed=11.0.4+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,fixed=8.0.0-20251031095924-e7e23b94e006
- Mattermost Server

## Identifiers

- CVE-2025-13324
- GHSA-x3r8-2hmh-89f5
- GO-2025-4256

## Related threats

- [Mattermost CSRF via Agents plugin mention reminder validation](https://junglewise.ai/threats/cve-2026-93851-mattermost-versions-11-9-x-11-9-1-11-8-x-11-8-5-11-7-x-11-7-10)
- [Mattermost denial of service via PDF text extraction memory exhaustion](https://junglewise.ai/threats/cve-2026-93850-mattermost-versions-11-9-x-11-9-1-11-8-x-11-8-5-11-7-x-11-7-10-11)
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- [Mattermost information disclosure in post deletion events](https://junglewise.ai/threats/cve-2026-19621-mattermost-versions-11-10-x-11-10-0-11-7-x-11-7-9-11-9-x-11-9-1)
- [Mattermost authentication token leak in server logs](https://junglewise.ai/threats/cve-2026-19600-mattermost-versions-11-9-x-11-9-1-11-8-x-11-8-5-11-7-x-11-7-10-11)