Events Manager <= 7.4.0.1 - Reflected Cross-Site Scripting via 'header_format' Parameter
| CVE | CVE-2026-17089 |
|---|---|
| CVSS | 6.1 (Medium) |
| Publicly Published | August 24, 2026 |
| Last Updated | August 25, 2026 |
| Researcher |
Wordfence PRISM
- Wordfence
|
Description
The Events Manager – Calendar, Bookings, Tickets, and more! plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'header_format' 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 unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link. The shortcode entry point sanitizes 'header_format' via wp_kses(), but the unauthenticated 'search_events_grouped' AJAX action bypasses this sanitization entirely, leaving the parameter unsanitized before it is echoed into the HTML body in output_grouped().
Learn more about Cross-Site Scripting vulnerabilities and how to prevent them.
References
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
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Vulnerability Details for Events Manager – Calendar, Bookings, Tickets, and more!
| Software Type | Plugin |
|---|---|
| Software Slug | events-manager (view on wordpress.org) |
| Patched? | Yes |
| Remediation | Update to version 7.4.1, or a newer patched version |
| Affected Version |
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| Patched Version |
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Recent vulnerabilities in Events Manager – Calendar, Bookings, Tickets, and more!
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