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CVE-2026-3524

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CVE-2026-3524

Published: Apr 6, 2026

Modified: Apr 7, 2026

PUBLISHED

CVSS v3.1

8.3

HIGH

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

VendorProductVersions

Mattermost

Mattermost

affected
0 - <= 1.1.4
unaffected
1.1.5

Weaknesses (CWE)

CWE-862

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

References

MMSA-2026-00621
vendor-advisory

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