CVE-2025-22449: Mattermost Incorrect Authorization vulnerability

January 9, 2025 (updated January 16, 2025)

Mattermost versions 9.11.x <= 9.11.5 fail to enforce invite permissions, which allows team admins, with no permission to invite users to their team, to invite users by updating the “allow_open_invite” field via making their team public.

References

github.com/advisories/GHSA-q8fg-cp3q-5jwm
github.com/mattermost/mattermost
mattermost.com/security-updates
nvd.nist.gov/vuln/detail/CVE-2025-22449

Code Behaviors & Features

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