WordPress Events Manager plugin <= 7.4.0.1 - Reflected Cross-Site Scripting via 'header_format' Parameter vulnerability

Reflected Cross-Site Scripting via 'headerformat' Parameter vulnerability discovered by Wordfence PRISM - Wordfence in WordPress Plugin Events Manager versions = 7.4.0.1...

CVE-2026-17089

The Events Manager – Calendar, Bookings, Tickets, and more! plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'headerformat' parameter in all versions up to, and including, 7.4.0.1 due to insufficient input sanitization and output escaping. This makes it possible for...

CVE-2026-17089 Events Manager <= 7.4.0.1 - Reflected Cross-Site Scripting via 'header_format' Parameter

The Events Manager – Calendar, Bookings, Tickets, and more! plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'headerformat' parameter in all versions up to, and including, 7.4.0.1 due to insufficient input sanitization and output escaping. This makes it possible for...

CVE-2026-17089

The Events Manager WordPress plugin (up to and including 7.4.0.1 ) is vulnerable to Reflected Cross-Site Scripting via the header_format parameter. While the shortcode entry point sanitizes this parameter with wp_kses(), the unauthenticated search_events_grouped AJAX action bypasses that sanitiza...

EUVD-2026-65277

The Events Manager – Calendar, Bookings, Tickets, and more! plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'headerformat' parameter in all versions up to, and including, 7.4.0.1 due to insufficient input sanitization and output escaping. This makes it possible for...

CVE-2026-17089 Events Manager <= 7.4.0.1 - Reflected Cross-Site Scripting via 'header_format' Parameter

The Events Manager – Calendar, Bookings, Tickets, and more! plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'headerformat' parameter in all versions up to, and including, 7.4.0.1 due to insufficient input sanitization and output escaping. This makes it possible for...