HIGHCVE-2026-3524Published Modified CNA Mattermost
CVE-2026-3524: Authorization Bypass in Mattermost Legal Hold Plugin Due to Missing Return After Permission Check
Mattermost Plugin Legal Hold versions <=1.1.4 fail to halt request processing after a failed authorization check in ServeHTTP which allows an authenticated attacker to access, create, download, and delete legal hold data via crafted API requests to the plugin's endpoints. Mattermost Advisory ID: MMSA-2026-00621
Metrics
- CVSS v3.1
- 8.3
- Severity
- HIGH
- Fixed in
- 1.1.5
- Affected Products
- 1
Fix available
1.1.5
Affected packages
- Mattermost / Mattermost≤ 1.1.4Fixed in 1.1.5
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HReferences