CVEvulnerability

CVE-2026-16044

5.4 MEDIUM Published 2026-08-17 Modified 2026-08-18 Official page ↗
Status
Analyzed
Published
2026-08-17
Last modified
2026-08-18
Assigner
[email protected]
CVSS 3.1 ([email protected])
5.4 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
Weaknesses
CWE-863

Description

Mattermost versions 11.7.x <= 11.7.6, 10.11.x <= 10.11.21 fail to prevent guest users from receiving Board Admin privileges during board archive import which allows a board member to escalate a guest user to Board Admin via importing a crafted .boardarchive file. Mattermost Advisory ID: MMSA-2026-00672

Affected configurations

• mattermost mattermost server (>= 10.11.0 < 10.11.22) • mattermost mattermost server (>= 11.7.0 < 11.7.7)

Related

Weakness · CWE (1)

  • CWE-863 Incorrect Authorization weakness

References