CVE-2018-17866

Multiple cross-site scripting (XSS) vulnerabilities in includes/core/um-actions-login.php in the "Ultimate Member – User Profile & Membership" plugin before 2.0.28 for WordPress allow remote attackers to inject arbitrary web script or HTML via the "Primary button Text" or "Second button text" field.

Date published : 2018-10-09

Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin

https://serhack.me/articles/ultimate-member-xss-security-issue