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Description

Mattermost versions 10.5.x <= 10.5.1, 10.4.x <= 10.4.3, 9.11.x <= 9.11.9 fail to check the "Allow Users to View Archived Channels" configuration when fetching channel metadata of a post from archived channels, which allows authenticated users to access such information when a channel is archived.

PUBLISHED Reserved 2025-04-08 | Published 2025-04-16 | Updated 2025-04-16 | 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

10.5.0 (semver)
affected

10.4.0 (semver)
affected

9.11.0 (semver)
affected

10.6.0
unaffected

10.5.2
unaffected

10.4.4
unaffected

9.11.10
unaffected

Credits

hackit_bharat finder

References

mattermost.com/security-updates

cve.org (CVE-2025-27571)

nvd.nist.gov (CVE-2025-27571)

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