CVE-2025-58073

Arbitrary Mattermost Team can be joined by manipulating the OAuth state

CVSS 8.1 HIGHEPSS 0.4%CWE-862

Vexday Risk Score

21Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 8.1EPSS 0.4%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

16 Oct 2025Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

Mattermost versions 10.11.x <= 10.11.1, 10.10.x <= 10.10.2, 10.5.x <= 10.5.10 fail to verify a user has permission to join a Mattermost team using the original invite token which allows any attacked to join any team on a Mattermost server regardless of restrictions via manipulating the OAuth state.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Affected products

Mattermost · Mattermost

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References

https://mattermost.com/security-updates