CVE-2025-14573: Team Admin Bypass of Invite Permissions via allow_open_invite Field

Severity: low (CVSS 2.7 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-02-16 · updated 2026-06-17
Weakness: CWE-862

Description

Mattermost versions 10.11.x <= 10.11.9 fail to enforce invite permissions when updating team settings, which allows team administrators without proper permissions to bypass restrictions and add users to their team via API requests. Mattermost Advisory ID: MMSA-2025-00561

Affected products

Mattermost: from 10.11.0 before 10.11.10 — fixed in 10.11.10

How to fix

Upgrade to a fixed version: Mattermost 10.11.10. Check the vendor advisory for mitigations.

References

https://mattermost.com/security-updates

Get alerted when CVE-2025-14573 or the next vulnerability affects your stack