Executive brief
The RTMKit plugin for WordPress, which provides design widgets for website building, contains a security flaw in its Advanced Heading component. This vulnerability allows users with basic contributor-level access to embed malicious scripts into website pages. When other visitors or administrators view these pages, the scripts can execute automatically, potentially leading to unauthorized actions or data theft.
Technical details
The RTMKit plugin for WordPress is vulnerable to Stored Cross-Site Scripting (XSS) due to insufficient output escaping on the 'background_text_heading' setting within the render() function of the Advanced Heading widget. The vulnerability occurs because the plugin concatenates user-supplied values directly into an HTML attribute without applying the esc_attr() function. This allows authenticated attackers with contributor-level permissions or higher to inject arbitrary web scripts into a page. These scripts will execute in the context of any user's browser who visits the affected page. The issue is addressed in version 2.0.8.
Affected products
- rometheme RTMKit up to, and including, 2.0.7
Timeline
- 2026-07-03: disclosed
- 2026-07-03: advisory
References
- https://plugins.trac.wordpress.org/browser/rometheme-for-elementor/tags/2.0.4/Inc/Elements/AdvancedHeading.php
- https://plugins.trac.wordpress.org/browser/rometheme-for-elementor/tags/2.0.4/Inc/Elements/AdvancedHeading.php
- https://plugins.trac.wordpress.org/browser/rometheme-for-elementor/tags/2.0.7/Inc/Elements/AdvancedHeading.php
- https://plugins.trac.wordpress.org/browser/rometheme-for-elementor/tags/2.0.7/Inc/Elements/AdvancedHeading.php
- https://plugins.trac.wordpress.org/browser/rometheme-for-elementor/trunk/Inc/Elements/AdvancedHeading.php
- https://plugins.trac.wordpress.org/browser/rometheme-for-elementor/trunk/Inc/Elements/AdvancedHeading.php
- https://plugins.trac.wordpress.org/changeset/3568335/rometheme-for-elementor/trunk/Inc/Elements/AdvancedHeading.php