PT-2025-37464 · Mattermost · Mattermost

Daw10 · Published 2025-09-15 · Updated 2025-09-22 · CVE-2025-9076

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Mattermost versions 10.10.x through 10.10.1

Description Mattermost Server instances with shared channels enabled are susceptible to an information disclosure issue. The software fails to properly sanitize user data during shared channel membership synchronization, potentially allowing malicious or compromised remote clusters to access sensitive user information via unsanitized user objects.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Missing Authorization

Weakness Enumeration

CWE-862

Related Identifiers

CVE-2025-9076

GHSA-3VCM-C42P-3HHF

GO-2025-3950

OPENSUSE-SU-2025:15564-1

SUSE-SU-2025:03289-1

Affected Products

Mattermost

References · 49

• https://osv.dev/vulnerability/SUSE-SU-2025:03289-1 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2025-9076 · Vendor Advisory
• https://osv.dev/vulnerability/GO-2025-3950 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2025:15564-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-9076 · Security Note
• https://osv.dev/vulnerability/GHSA-3vcm-c42p-3hhf · Vendor Advisory
• https://github.com/mattermost/mattermost · Note
• https://suse.com/security/cve/CVE-2025-8077 · Note
• https://suse.com/security/cve/CVE-2025-56760 · Note
• https://suse.com/security/cve/CVE-2025-58355 · Note
• https://suse.com/security/cve/CVE-2025-9566 · Note
• https://suse.com/security/cve/CVE-2025-58157 · Note
• https://suse.com/security/cve/CVE-2025-54123 · Note
• https://suse.com/security/cve/CVE-2025-59361 · Note
• https://suse.com/security/cve/CVE-2024-52284 · Note