CVE-2022-29455

Elementor Website Builder <= 3.5.5 - Unauthenticated DOM-based Reflected Cross-Site Scripting

2022-06-13 00:00
Rotem Bar

Strategic Overview

Status
Patched in 3.5.6
Affected Plugin
Elementor Website Builder – more than just a page builder
Affected Version
<= 3.5.5
CVSS
6.1Medium
Weakness type
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE
CVE-2022-29455
View all Elementor Website Builder – more than just a page builder vulnerabilities

At a glance

CVE-2022-29455 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the Elementor Website Builder WordPress plugin, affecting versions <= 3.5.5. It carries a CVSS score of 6.1 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 3.5.6; sites on affected versions should update now. Disclosed June 2022, reported by Rotem Bar.

Vulnerability Overview

The Elementor Website Builder plugin for WordPress is vulnerable to Unauthenticated DOM-based Reflected Cross-Site Scripting via the ‘videoType’ and 'onError' parameter in the lightbox module in versions up to, and including, 3.5.5 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site.

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Elementor Website Builder <= 3.5.5 carries this weakness at videoType, and reaching it takes no account at all. Cross-site scripting happens when input from a request is written into a page without being escaped for the context it lands in, so the browser parses attacker-supplied text as markup or script.

Injected script runs with the privileges of whoever views the affected page, which is how these flaws turn into administrator session theft, silent account creation or persistent backdoors in page content. For Elementor Website Builder the fix is 3.5.6: builds <= 3.5.5 are affected, anything from 3.5.6 onward is not.

Remediation

Update to version 3.5.6, or a newer patched version

How does WordSec protect against this?

Requests carrying this pattern arrive without a session, so nothing upstream of the firewall gets a chance to reject them: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Elementor Website Builder 3.5.6 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Login Security
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2022-29455https://www.wordfence.com/threat-intel/vulnerabilities/id/f7f08d0a-b3ac-4363-ba6e-91a8e13605cahttps://nvd.nist.gov/vuln/detail/CVE-2022-29455

Related records

Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C