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The Hustle – Email Marketing, Lead Generation, Optins, Popups plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'content[cta_label]' parameter in all versions up to, and including, 7.8.14.3 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with custom-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. By default only Administrators hold the hustle_edit_module capability, but the plugin's built-in Permissions screen allows administrators to delegate this capability to lower roles including Subscriber, enabling Subscriber-level exploitation on sites where that delegation has been configured.

• https://www.wordfence.com/threat-intel/vulnerabilities/id/e212b92a-e5f4-415d-9205-070fe720a687?source=cve
• https://plugins.trac.wordpress.org/browser/wordpress-popup/tags/7.8.14.3/inc/front/hustle-module-renderer.php#L500
• https://plugins.trac.wordpress.org/browser/wordpress-popup/tags/7.8.14.3/inc/front/hustle-module-renderer.php#L479
• https://plugins.trac.wordpress.org/browser/wordpress-popup/tags/7.8.14.3/inc/hustle-modules-common-admin-ajax.php#L56
• https://plugins.trac.wordpress.org/browser/wordpress-popup/tags/7.8.14.3/inc/hustle-module-model.php#L574
• https://plugins.trac.wordpress.org/browser/wordpress-popup/tags/7.8.14.4/inc/front/hustle-module-renderer.php