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Description

Mattermost versions 11.4.x <= 11.4.0, 11.3.x <= 11.3.1, 11.2.x <= 11.2.3, 10.11.x <= 10.11.11 fail to validate Advanced Logging file target paths which allows system administrators to read arbitrary host files via malicious AdvancedLoggingJSON configuration in support packet generation. Mattermost Advisory ID: MMSA-2025-00562

PUBLISHED Reserved 2026-02-24 | Published 2026-03-26 | Updated 2026-03-26 | Assigner Mattermost




MEDIUM: 6.8CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N

Problem types

CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Product status

Default status
unaffected

11.4.0 (semver)
affected

11.3.0 (semver)
affected

11.2.0 (semver)
affected

10.11.0 (semver)
affected

11.5.0
unaffected

11.4.1
unaffected

11.3.2
unaffected

11.2.4
unaffected

10.11.12
unaffected

Credits

mufeedvh finder

References

mattermost.com/security-updates (MMSA-2025-00562) vendor-advisory

cve.org (CVE-2026-3112)

nvd.nist.gov (CVE-2026-3112)

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