The Google Tag Manager for WordPress plugin for WordPress is vulnerable to reflected Cross-Site Scripting via the s parameter due to the site search populating into the data layer of sites with insufficient sanitization in versions up to an including 1.15. The affected file is ~/public/frontend.php and this could be exploited by unauthenticated attackers.
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Check my exposure →This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.