CVEvulnerability

CVE-2026-6342

4.3 MEDIUM Published 2026-05-18 Modified 2026-10-14 Official page ↗
Status
Analyzed
Published
2026-05-18
Last modified
2026-10-14
Assigner
[email protected]
CVSS 3.1 ([email protected])
4.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Weaknesses
CWE-863

Description

Mattermost Plugins versions <=11.5 11.1.5 10.13.11 11.3.4.0 fail to appropriately check for valid namespaces which allows plugin users to create subscriptions to groups that were not whitelisted via creating groups that share the same prefix as a whitelisted group. Mattermost Advisory ID: MMSA-2026-00601

Affected configurations

• mattermost mattermost server (>= 10.13.0 <= 10.13.11) • mattermost mattermost server (>= 11.1.0 <= 11.1.5) • mattermost mattermost server (>= 11.3.0 <= 11.3.4)

Related

Weakness · CWE (1)

  • CWE-863 Incorrect Authorization weakness

References