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A Stored Cross-Site Scripting (XSS) vulnerability exists in the Contact List plugin for WordPress (versions up to 3.0.18) where the '_cl_map_iframe' parameter fails to properly sanitize and escape Google Maps iframe custom fields, allowing authenticated attackers with Contributor-level access or higher to inject arbitrary JavaScript that executes in the browsers of users viewing affected pages. The vulnerability stems from insufficient input validation in the saveCustomFields() function and missing output escaping in the front-end rendering, creating a persistent XSS condition with a CVSS score of 6.4 and low-to-moderate exploitation probability given the authentication requirement.
A Stored Cross-Site Scripting (XSS) vulnerability exists in the Contact List plugin for WordPress (versions up to 3.0.18) where the '_cl_map_iframe' parameter fails to properly sanitize and escape Google Maps iframe custom fields, allowing authenticated attackers with Contributor-level access or higher to inject arbitrary JavaScript that executes in the browsers of users viewing affected pages. The vulnerability stems from insufficient input validation in the saveCustomFields() function and missing output escaping in the front-end rendering, creating a persistent XSS condition with a CVSS score of 6.4 and low-to-moderate exploitation probability given the authentication requirement.