Executive Summary

The WP Maps plugin for WordPress, which integrates Google Maps, OpenStreetMap, Mapbox, and other features, has a Stored Cross-Site Scripting (XSS) vulnerability. This vulnerability exists in all versions up to and including 4.9.4 due to insufficient input sanitization and output escaping of the 'location_messages' parameter.

An attacker with administrator-level access or higher, or with the custom capability 'wpgmp_manage_location', can inject malicious scripts into pages. These scripts execute whenever a user accesses the infected page.

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Impact Analysis

This vulnerability allows an authenticated attacker with sufficient privileges to inject arbitrary web scripts into the plugin's pages. When other users visit these pages, the malicious scripts execute in their browsers.

The impact includes potential theft of user credentials, session hijacking, defacement, or other malicious actions performed via the injected scripts. Since exploitation requires high privileges, the risk is limited to users with administrator or similarly elevated roles.

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