CVE-2025-6226

MediumCVSS 6.5/10Last modified Jun 17, 2026

Description

Mattermost versions 10.5.x <= 10.5.6, 10.8.x <= 10.8.1, 10.7.x <= 10.7.3, 9.11.x <= 9.11.16 fail to verify authorization when retrieving cached posts by PendingPostID which allows an authenticated user to read posts in private channels they don't have access to via guessing the PendingPostID of recently created posts.

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Weakness enumeration

CWE-306

Affected software

No affected versions have been published.

Timeline

Published: Jul 18, 2025
Last modified: Jun 17, 2026
NVD status: Analyzed

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