CVEvulnerability

CVE-2026-8823

3.8 LOW Published 2026-06-22 Modified 2026-06-26 Official page ↗
Status
Analyzed
Published
2026-06-22
Last modified
2026-06-26
Assigner
[email protected]
CVSS 3.1 ([email protected])
3.8 LOW — CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:L
Weaknesses
CWE-863

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

Affected configurations

• mattermost mattermost server (>= 10.11.0 < 10.11.18) • mattermost mattermost server (>= 11.7.0 < 11.7.1)

Related

Weakness · CWE (1)

  • CWE-863 Incorrect Authorization weakness

References