Description
The HudsonPrivateSecurityRealm class in Jenkins before 1.600 and LTS before 1.596.1 does not restrict access to reserved names when using the "Jenkins' own user database" setting, which allows remote attackers to gain privileges by creating a reserved name.
Remediation
References
Related Vulnerabilities
Drupal Inclusion of Functionality from Untrusted Control Sphere Vulnerability (CVE-2017-6381)
WordPress Plugin iThemes Security (formerly Better WP Security) Security Bypass (5.3.0)
Squid Permissions, Privileges, and Access Controls Vulnerability (CVE-2012-2213)