CVE-2025-12419

Description

Mattermost fails to properly validate OAuth state tokens during OpenID Connect authentication in github.com/mattermost/mattermost-server. NOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions. (If this is causing false-positive reports from vulnerability scanners, please suggest an edit to the report.) The additional affected modules and versions are: github.com/mattermost/mattermost-server from v10.5.0 before v10.5.13, from v10.11.0 before v10.11.5, from v10.12.0 before v10.12.2, from v11.0.0 before v11.0.4.

How to fix CVE-2025-12419

To remediate CVE-2025-12419, upgrade the affected package to a fixed version below.

• —upgrade to 10.12.2 or later
• —no fix listed
• —no fix listed
• —no fix listed
• —upgrade to 8.0.0-20251028000919-d3ed703dc833 or later
• —upgrade to 8.0.0-20251028000919-d3ed703dc833 or later

Is CVE-2025-12419 being exploited?

Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.

Affected packages (6)

• >= 10.12.0, < 10.12.2
• from 0
• from 0
• from 0
• from 0, < 8.0.0-20251028000919-d3ed703dc833
• from 0, < 8.0.0-20251028000919-d3ed703dc833

CVSS scores

References (10)

• ADVISORYgithub.com/advisories/GHSA-3x39-62h4-f8j6
• ADVISORYnvd.nist.gov/vuln/detail/CVE-2025-12419
• PATCHgithub.com/mattermost/mattermost
• WEBgithub.com/mattermost/mattermost/commit/15364790cc277cfaa372693d2d5442b87f70fd42