CVE-2026-8489
MediumCVSS 6.4Summary
The Ultimate Member plugin for WordPress is vulnerable to stored XSS via the 'about_me' parameter in versions up to and including 2.11.4 due to insufficient input sanitization and output escaping.
Risk Assessment
Authenticated attackers with subscriber-level access or higher can inject arbitrary scripts that execute when users visit affected pages, potentially leading to session theft, redirects, or other malicious actions.
Recommendation
Immediately update the Ultimate Member plugin to the latest available version that fixes this vulnerability. Also restrict user privileges to the minimum necessary.
Original NVD description (English source)
The Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'about_me' parameter in all versions up to, and including, 2.11.4 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.