Prime Elementor Addons WordPress Plugin Stored Cross-Site Scripting Vulnerability

A stored cross-site scripting vulnerability has been identified in the Prime Elementor Addons WordPress plugin, specifically in versions up to and including 1.3.3. The issue arises from inadequate input sanitization and output escaping in the Widget HTML Tag Settings. This vulnerability allows authenticated attackers with contributor-level access or higher to inject arbitrary web scripts into pages. The injected scripts are executed when a user accesses the affected page. Notably, the exploitation does not require the unfiltered_html capability, as the payload can be crafted to bypass Elementor's wp_kses_post() filter by omitting HTML angle brackets.

Impact

Exploitation of this vulnerability allows for stored cross-site scripting, where injected scripts are executed in the context of the user viewing the page.

Reproduction

To reproduce this vulnerability, an authenticated user with contributor-level access or higher can navigate to the Widget HTML Tag Settings within the Prime Elementor Addons plugin. Here, they can inject a script payload, such as an image tag with an 'onerror' event, which will be executed when the page is accessed.

Remediation

Users can update the Prime Elementor Addons WordPress plugin to version 1.3.4 or later, where this vulnerability has been addressed.