EUVD-2026-13922
GHSA-9mgv-v56m-vc43
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Lifecycle Timeline
3Description
The Contact List plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the '_cl_map_iframe' parameter in all versions up to, and including, 3.0.18. This is due to insufficient input sanitization and output escaping when handling the Google Maps iframe custom field. The saveCustomFields() function in class-contact-list-custom-fields.php uses a regex to extract <iframe> tags from user input but does not validate or sanitize the iframe's attributes, allowing event handlers like 'onload' to be included. The extracted iframe HTML is stored via update_post_meta() and later rendered on the front-end in class-cl-public-card.php without any escaping or wp_kses filtering. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Analysis
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.
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Remediation
Within 30 days: Identify affected systems running all and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.
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External POC / Exploit Code
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