netweblogic Events Manager Plugin up to 7.4.0.1 on WordPress Ajax Action output_grouped header_format cross site scripting

Summaryinfo

A vulnerability, which was classified as problematic, was found in netweblogic Events Manager Plugin up to 7.4.0.1. The affected element is the function output_grouped of the component Ajax Action. Such manipulation of the argument header_format leads to cross site scripting. This vulnerability is listed as CVE-2026-17089. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability was found in netweblogic Events Manager Plugin up to 7.4.0.1. It has been rated as problematic. Affected by this issue is the function output_grouped of the component Ajax Action. The manipulation of the argument header_format with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity. CVE summarizes:

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().

The advisory is shared for download at wordfence.com. This vulnerability is handled as CVE-2026-17089 since 07/24/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1059.007.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• WordPress Plugin

Vendor

• netweblogic

Name

• Events Manager Plugin

Version

• 7.4.0.0
• 7.4.0.1

CPE 2.3info

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CPE 2.2info

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