Description
WordPress and WordPress MU before 2.8.1 exhibit different behavior for a failed login attempt depending on whether the user account exists, which allows remote attackers to enumerate valid usernames. NOTE: the vendor reportedly disputes the significance of this issue, indicating that the behavior exists for "user convenience."
Remediation
References
Related Vulnerabilities
WordPress Plugin Advanced Page Manager Cross-Site Scripting (1.4.1)
WordPress Plugin Mailster-Email Newsletter for WordPress Local File Inclusion (4.0.6)
WordPress Plugin Browser Screenshots Cross-Site Scripting (1.7.5)
Contao Improper Control of Generation of Code ('Code Injection') Vulnerability (CVE-2021-37626)