CVE-2026-3524CWE-862broken-access-control

CVE-2026-3524

High · published April 6, 2026

CVSS v3.1
8.8
EPSS
0%
Percentile
34.9
In the wild
Unconfirmed
What it is

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

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00417 · 34.9th percentile
Weakness
CWE-862 · Missing Authorization
Published
2026-04-06T17:17Z
Affected products (1)
ProductVersionsFixed in
mattermost/legal_hold< 1.1.51.1.5
References (1)
https://mattermost.com/security-updates · [email protected]
EPSS history
Timeline
  • 06 APR 12:06Z
    Authorization Bypass in Mattermost Legal Hold Plugin Due to Missing Return After Permission Check
    cvelistv5