CVE-2018-17866: Ultimatemember Ultimate Member

Medium severity, CVSS 6.1. EPSS: 1.6% chance of exploitation in the next 30 days.

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.

Affected products

• Ultimatemember Ultimate Member: before 2.0.28 (fixed in 2.0.28)

Published 2018-10-09. Last modified 2026-06-17.