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Description

Mattermost versions <11 fail to properly restrict access to archived channel search API which allows guest users to discover archived public channels via the `/api/v4/teams/{team_id}/channels/search_archived` endpoint

PUBLISHED Reserved 2025-10-15 | Published 2025-11-14 | Updated 2025-11-14 | Assigner Mattermost




MEDIUM: 4.3CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Problem types

CWE-863: Incorrect Authorization

Product status

Default status
unaffected

<11 (semver)
affected

11.0.0
unaffected

Credits

lordwillmore finder

References

mattermost.com/security-updates

cve.org (CVE-2025-11776)

nvd.nist.gov (CVE-2025-11776)

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