CVE-2026-8823

low

Description

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

References

https://mattermost.com/security-updates

Details

Source: Mitre, NVD

Published: 2026-06-22

Updated: 2026-06-22

Risk Information

CVSS v2

Base Score: 4.7

Vector: CVSS2#AV:N/AC:L/Au:M/C:N/I:P/A:P

Severity: Medium

CVSS v3

Base Score: 3.8

Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:L

Severity: Low

Detections

Analytics