PT-2020-7999 · Mattermost · Mattermost Server

Published 2020-06-19 · Updated 2025-11-07 · CVE-2016-11070

Positive Technologies (AI Summary)

CVSS v3.1

5.4

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions: Mattermost Server versions prior to 3.1.0

Description: The issue allows for cross-site scripting (XSS) attacks via theme color-code values. This means an attacker could potentially inject malicious code into a website, exploiting the vulnerability to steal user data or take control of the user's session.

Recommendations: For versions prior to 3.1.0, update to version 3.1.0 or later to resolve the issue. As a temporary workaround, consider restricting the ability to modify theme color-code values to minimize the risk of exploitation.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2016-11070

GHSA-H8QW-XQM9-Q66J

GO-2025-4050

OPENSUSE-SU-2025:15710-1

Affected Products

Mattermost Server

References · 81

• https://osv.dev/vulnerability/GO-2025-4050 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2016-11070 · Security Note
• https://osv.dev/vulnerability/GHSA-h8qw-xqm9-q66j · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2025:15710-1 · Vendor Advisory
• https://mattermost.com/security-updates · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2016-11070 · Vendor Advisory
• https://github.com/mattermost/mattermost · Note
• https://github.com/mattermost/mattermost/commit/c5deb333db40e4e527f98edb93b41d1b66cfec5f · Note
• https://suse.com/security/cve/CVE-2025-58356 · Note
• https://suse.com/security/cve/CVE-2025-61141 · Note
• https://suse.com/security/cve/CVE-2025-64102 · Note
• https://suse.com/security/cve/CVE-2025-62375 · Note
• https://suse.com/security/cve/CVE-2016-11074 · Note
• https://suse.com/security/cve/CVE-2025-58075 · Note
• https://suse.com/security/cve/CVE-2016-11072 · Note