CVE-2024-8071: Mattermost doesn't restrict which roles can promote a user as system admin

August 22, 2024 (updated August 23, 2024)

Mattermost versions 9.9.x <= 9.9.1, 9.5.x <= 9.5.7, 9.10.x <= 9.10.0 and 9.8.x <= 9.8.2 fail to restrict which roles can promote a user as system admin which allows a System Role with edit access to the permissions section of system console to update their role (e.g. member) to include the manage_system permission, effectively becoming a System Admin.

References

github.com/advisories/GHSA-5263-pm2h-m7hw
github.com/mattermost/mattermost
mattermost.com/security-updates
nvd.nist.gov/vuln/detail/CVE-2024-8071

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