Events Manager Stored Cross-Site Scripting Vulnerability in WordPress

A stored cross-site scripting vulnerability has been identified in the Events Manager plugin for WordPress, affecting all versions through 7.2.2.1. The issue arises from inadequate input sanitization and output escaping on user-supplied attributes, particularly within the 'events_list_grouped' shortcode. This vulnerability allows authenticated attackers with contributor-level access or higher to inject arbitrary web scripts into pages, which are executed when users access the affected pages.

Impact

Exploitation of this vulnerability allows for stored cross-site scripting, where injected scripts are executed in the context of the user viewing the page.

Reproduction

To reproduce this vulnerability, an authenticated user with contributor-level access or higher can use the 'events_list_grouped' shortcode to inject a script. The injected script will be executed when the page is accessed by a user.

Remediation

Users are advised to update the Events Manager plugin to version 7.2.3 or a newer patched version.