CVSS 4.9 (medium) · published 2026-10-16
Mattermost versions 11.9.x <= 11.9.1, 11.8.x <= 11.8.5, 11.7.x <= 11.7.10, 11.10.x <= 11.10.1 fail to invalidate the stored AD/LDAP bind password when other connection settings (such as the server address) are changed, which allows a System Console administrator to disclose the plaintext bind password to an attacker-controlled server via the Test Connection / diagnostics feature. Mattermost Advisory ID: MMSA-2026-00764
Affected products (NVD): mattermost mattermost_server
Fixed in (NVD): 11.7.11, 11.8.6, 11.9.2, 11.10.2
Weakness: CWE-201
Source: NVD CVE-2026-19601
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