CVE-2025-13870

Unauthorized access and subscription vulnerability in Boards

State: Published
Severity: 3.1 Low
Published: Dec 2, 2025
Updated: Dec 2, 2025
Reserved: Dec 2, 2025

Description

Mattermost versions 10.11.x <= 10.11.4, 10.5.x <= 10.5.12 fail to validate the user permission when accessing the files and subscribing to the block in Boards, which allows an authenticated user to access other board files and was able to subscribe to the block from other boards that the user does not have access to

Scores

CVSS	Score	Vector	Source
3.1	3.1 Low	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N	Mattermost

Weaknesses

CWE-306 Missing Authentication for Critical Function

Affected Products

Product	Versions
MattermostMattermost	10.11.0 through 10.11.4Affected 10.5.0 through 10.5.12Affected 11.1.0Not affected 10.11.5Not affected 10.5.13Not affected

References

https://mattermost.com/security-updates

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