CVE-2026-8823 — User Manager can demote bot accounts to guest without bot-management permission
Mattermost versions 11.7.x <= 11.7.0, 10.11.x <= 10.11.17 fail to validate bot targets when demoting users to guests which allows a lower-privileged administrator to degrade arb…
Published: 2026-06-22 · CVSS: 3.8 · CVSS 3.1
Mattermost versions 11.7.x <= 11.7.0, 10.11.x <= 10.11.17 fail to validate bot targets when demoting users to guests which allows a lower-privileged administrator to degrade arbitrary bot accounts via the standard demote-user API.. Mattermost Advisory ID: MMSA-2026-00669
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7