PT-2025-30017 · Mattermost · Mattermost

Dawid Kulikowski · Published 2025-07-18 · Updated 2025-08-04 · CVE-2025-6226

Positive Technologies · (AI Summary)

CVSS v3.1

6.5

Medium

AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Name of the Vulnerable Software and Affected Versions Mattermost versions 9.11.x through 9.11.16 Mattermost versions 10.5.x through 10.5.6 Mattermost versions 10.7.x through 10.7.3 Mattermost versions 10.8.x through 10.8.1

Description The software fails to verify authorization when retrieving cached posts by PendingPostID. This allows an authenticated user to read posts in private channels they do not have access to by guessing the PendingPostID of recently created posts.

Recommendations Update Mattermost to a version later than 9.11.16. Update Mattermost to a version later than 10.5.6. Update Mattermost to a version later than 10.7.3. Update Mattermost to a version later than 10.8.1.

Fix

Missing Authentication

Weakness Enumeration

CWE-306

Related Identifiers

CVE-2025-6226

GHSA-7H34-9CHR-58QH

GO-2025-3819

OPENSUSE-SU-2025:15405-1

Affected Products

Mattermost

References · 68

• https://mattermost.com/security-updates · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-6226 · Security Note
• https://osv.dev/vulnerability/openSUSE-SU-2025:15405-1 · Vendor Advisory
• https://osv.dev/vulnerability/GO-2025-3819 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-7h34-9chr-58qh · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2025-6226 · Vendor Advisory
• https://github.com/mattermost/mattermost · Note
• https://github.com/mattermost/mattermost/commit/fa40a8c5d47fed5c166429a1c1bd95d62b241d89 · Note
• https://suse.com/security/cve/CVE-2025-4563 · Note
• https://suse.com/security/cve/CVE-2025-53513 · Note
• https://suse.com/security/cve/CVE-2025-30086 · Note
• https://suse.com/security/cve/CVE-2025-47281 · Note
• https://suse.com/security/cve/CVE-2024-44906 · Note
• https://suse.com/security/cve/CVE-2025-5689 · Note
• https://suse.com/security/cve/CVE-2025-52997 · Note