CVE-2026-19423
HighCVSS 8.1Exploitation Probability (EPSS)
Low risk20th percentile - higher than 20% of all known CVEs
Summary
The Ultimate Member WordPress plugin before version 2.13.0 does not validate a submitted role selection when it cannot resolve the set of roles a profile form permits, and screens the value against the site's registered role names rather than against the form's own allow-list. This allows unauthenticated users who register through the plugin's own form to grant themselves arbitrary capabilities and reach administrator-equivalent access.
Risk Assessment
An attacker could gain full control of the site by granting themselves administrator privileges, leading to complete takeover.
Recommendation
Update the Ultimate Member plugin to version 2.13.0 or later, which includes the role validation fix.
Other vulnerabilities in Ultimate Member WordPress plugin
Original NVD description (English source)
The Ultimate Member WordPress plugin before 2.13.0 does not validate a submitted role selection when it cannot resolve the set of roles a profile form permits, and screens the value against the site's registered role names rather than against the form's own allow-list, allowing unauthenticated users who register through the Ultimate Member WordPress plugin before 2.13.0's own form to grant themselves arbitrary capabilities and reach administrator-equivalent access.