The Plus Addons for Elementor Page Builder Lite < 2.0.6 - Contributor+ Stored XSS

The “The Plus Addons for Elementor Page Builder Lite” WordPress Plugin before 2.0.6 has four widgets that are vulnerable to stored Cross-Site Scripting (XSS) by lower-privileged users such as contributors, all via a similar method.

The “Accordion” widget accepts a “title_html_tag” parameter. Although the element control lists a fixed set of possible html tags, it is possible to send a ‘save_builder’ request containing JavaScript in the “title_html_tag” parameter, which is not filtered and is output without escaping. This JavaScript will then be executed when the saved page is viewed or previewed.

The “Infobox” widget accepts a “title_tag” parameter. Although the element control lists a fixed set of possible html tags, it is possible to send a ‘save_builder’ request containing JavaScript in the “title_tag” parameter, which is not filtered and is output without escaping. This JavaScript will then be executed when the saved page is viewed or previewed.

The “Heading animation” widget accepts a “ani_title_tag” parameter. Although the element control lists a fixed set of possible html tags, it is possible to send a ‘save_builder’ request containing JavaScript in the “ani_title_tag” parameter, which is not filtered and is output without escaping. This JavaScript will then be executed when the saved page is viewed or previewed.

The “Hovercard” widget accepts a “open_tag” parameter. Although the element control lists a fixed set of possible html tags, it is possible to send a ‘save_builder’ request containing JavaScript in the “open_tag” parameter, which is not filtered and is output without escaping. This JavaScript will then be executed when the saved page is viewed or previewed.

These vulnerabilities are nearly identical to the vulnerabilities we have recently disclosed in the main Elementor plugin: https://www.wordfence.com/blog/2021/03/cross-site-scripting-vulnerabilities-in-elementor-impact-over-7-million-sites/