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Description

Mattermost versions 11.0.x <= 11.0.2, 10.12.x <= 10.12.1, 10.11.x <= 10.11.4, 10.5.x <= 10.5.12 fail to validate user permissions when deleting comments in Boards, which allows an authenticated user with the editor role to delete comments created by other users.

PUBLISHED Reserved 2025-11-05 | Published 2025-12-01 | Updated 2025-12-01 | Assigner Mattermost




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

Problem types

CWE-863: Incorrect Authorization

Product status

Default status
unaffected

11.0.0 (semver)
affected

10.12.0 (semver)
affected

10.11.0 (semver)
affected

10.5.0 (semver)
affected

11.1.0
unaffected

11.0.3
unaffected

10.12.2
unaffected

10.11.5
unaffected

10.5.13
unaffected

Credits

daynight finder

References

mattermost.com/security-updates

cve.org (CVE-2025-12756)

nvd.nist.gov (CVE-2025-12756)

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