Log in Start free

Vulnerability · Published Dec 17, 2025 · Assigned by Mattermost

CVE-2025-13324Lack of Invalidation of Legacy Remote Cluster Invite Tokens After Confirmation

Low 3.7

In plain English

A low-severity incorrect authorization in Mattermost from Mattermost. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 10% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)3.7Low
Exploit odds (30 days)0.2%top 90.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Gogithub.com/mattermost/mattermost10.12.2GHSA-x3r8-2hmh-89f5
Gogithub.com/mattermost/mattermost10.11.5GHSA-x3r8-2hmh-89f5
Gogithub.com/mattermost/mattermost11.0.4GHSA-x3r8-2hmh-89f5
Gogithub.com/mattermost/mattermost10.11.5+incompatible, 10.12.2+incompatible, 11.0.4+incompatibleGO-2025-4256
Gogithub.com/mattermost/mattermost-server11.0.4GHSA-x3r8-2hmh-89f5
Gogithub.com/mattermost/mattermost-server11.0.4+incompatibleGO-2025-4256
Gogithub.com/mattermost/mattermost-server/v5no fix listedGO-2025-4256
Gogithub.com/mattermost/mattermost-server/v6no fix listedGO-2025-4256
Gogithub.com/mattermost/mattermost/server/v88.0.0-20251031095924-e7e23b94e006GO-2025-4256
Gogithub.com/mattermost/mattermost/server/v88.0.0-20251031095924-e7e23b94e006GHSA-x3r8-2hmh-89f5

Affected products (as reported)

VendorProductVersions
Mattermost Mattermost 10.11.0 – through 10.11.511.0.0 – through 11.0.410.12.0 – through 10.12.2

Weakness: CWE-863 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

References