CVE-2025-2570: System Admin Cannot Access Environment settings in System Console While System Manager Can

Severity: low (CVSS 2.7 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-05-15 · updated 2026-06-17
Weakness: CWE-863

Description

Mattermost versions 10.5.x <= 10.5.3, 9.11.x <= 9.11.11 fail to check `RestrictSystemAdmin` setting if user doesn't have access to `ExperimentalSettings` which allows a System Manager to access `ExperimentSettings` when `RestrictSystemAdmin` is true via System Console.

Affected products

Mattermost: from 9.11.0 before 9.11.12; from 10.5.0 before 10.5.4 — fixed in 10.5.4, 9.11.12

How to fix

Upgrade to a fixed version: Mattermost 10.5.4, 9.11.12. Check the vendor advisory for mitigations.

References

https://mattermost.com/security-updates

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