GHSA-58w6-w55x-6wq8

ghsaUSosv

Mattermost fails to validate user permissions in Boards

view advisory published 2025-12-02Licence: CC-BY-4.0

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

describes (1)

Related CVEs.

ID	severity	EPSS	exploitable	published
CVE-2025-13870US	medium4.3OT elevated	0.22% (13th)	—	2025-12-02
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 auth…

references

External citations — patches, advisories, analysis.

https://github.com/mattermost/mattermostPACKAGE
https://github.com/mattermost/mattermost/commit/ba86dfc5876b354b9d3c20ff45c08ca6f8426149WEB
https://mattermost.com/security-updatesWEB
https://nvd.nist.gov/vuln/detail/CVE-2025-13870ADVISORY

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