CVE-2026-3524
Authorization Bypass in Mattermost Legal Hold Plugin Due to Missing Return After Permission Check
- State
- Published
- Severity
- 8.3 High
- Published
- Apr 6, 2026
- Updated
- Apr 7, 2026
- Reserved
- Mar 4, 2026
Description
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
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 8.3 High | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | Mattermost |
Weaknesses
- CWE-862 Missing Authorization
Affected Products
| Product | Versions |
|---|---|
MattermostMattermost |
|
References
- MMSA-2026-00621vendor-advisory
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