GO-2025-4122

vendorUSosv

Mattermost Incorrect Authorization vulnerability in github.com/mattermost/mattermost

view advisory published 2025-11-17Licence: per source

Mattermost Incorrect Authorization vulnerability in github.com/mattermost/mattermost

01

describes (1)

Related CVEs.

IDseverity exploitable
CVE-2025-11777USmedium4.3OT elevated—
Mattermost versions 10.11.x <= 10.11.3, 10.5.x <= 10.5.11 fail to properly validate team membership permissions in the Add Channel Member API which allows users from one team to ac…
02

references

External citations — patches, advisories, analysis.

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