Description
wp-admin/user-new.php in WordPress before 4.9.1 sets the newbloguser key to a string that can be directly derived from the user ID, which allows remote attackers to bypass intended access restrictions by entering this string.
Remediation
References
Related Vulnerabilities
WordPress Plugin WordPress Download Manager Security Bypass (2.7.2)
WordPress Plugin Random Banner Cross-Site Scripting (4.1.4)
PHP Exposure of Sensitive Information to an Unauthorized Actor Vulnerability (CVE-2013-1643)
Lighttpd Permissions, Privileges, and Access Controls Vulnerability (CVE-2013-4559)