CVE-2024-13306: 
WordPress vulnerability analysis and mitigation

The Maps Plugin using Google Maps for WordPress (gmap-embed) before version 1.9.4 contains a stored Cross-Site Scripting (XSS) vulnerability identified as CVE-2024-13306. The vulnerability was publicly disclosed on January 24, 2025, and affects WordPress installations using this plugin (WPScan, Debian Tracker).

The vulnerability stems from improper sanitization and escaping of certain plugin settings. This security flaw exists even when the unfiltered_html capability is disallowed, such as in multisite setups. The vulnerability has been assigned a CVSS score of 3.5 (low severity) and is classified under CWE-79, falling into the OWASP Top 10 category A7: Cross-Site Scripting (WPScan).

The vulnerability allows high-privilege users such as administrators to perform Stored Cross-Site Scripting attacks. The impact is particularly notable in multisite WordPress installations where even with restricted HTML filtering, the vulnerability can still be exploited (Debian Tracker).

A proof of concept exists demonstrating the vulnerability exploitation. The attack can be executed by accessing the plugin settings page at '/wp-admin/admin.php?page=wpgmapembed-settings' and inserting malicious payload in the 'Custom CSS' field. The XSS payload is triggered when viewing pages or posts where the affected map is embedded (WPScan).

The vulnerability has been fixed in version 1.9.4 of the gmap-embed plugin. Users are advised to update to this version to mitigate the security risk (WPScan).