CVE-2021-24256

Elementor Header & Footer Builder <= 1.5.7 - Stored Cross-Site Scripting

2021-04-13 00:00
Ram

Strategic Overview

Status
Patched in 1.5.8
Affected Plugin
Ultimate Addons for Elementor – Widgets, Templates, WooCommerce & Header Footer Builder
Affected Version
< 1.5.8
CVSS
6.4Medium
Weakness type
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE
CVE-2021-24256
View all Ultimate Addons for Elementor – Widgets, Templates, WooCommerce & Header Footer Builder vulnerabilities

At a glance

CVE-2021-24256 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the Ultimate Addons for Elementor WordPress plugin, affecting versions < 1.5.8. It carries a CVSS score of 6.4 (reachable over the network; low attack complexity). The issue is fixed in version 1.5.8; sites on affected versions should update now. Disclosed April 2021, reported by Ram.

Vulnerability Overview

The “Elementor – Header, Footer & Blocks Template” WordPress Plugin before 1.5.8 has two widgets that are vulnerable to stored Cross-Site Scripting (XSS) by lower-privileged users such as contributors, all via a similar method.

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 interaction from a victim user.

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

Reaching this weakness in Ultimate Addons for Elementor < 1.5.8 takes a caller who can reach the endpoint. 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 Ultimate Addons for Elementor the fix is 1.5.8: builds < 1.5.8 are affected, anything from 1.5.8 onward is not.

Remediation

Update to version 1.5.8, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to Ultimate Addons for Elementor: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Ultimate Addons for Elementor 1.5.8 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2021-24256https://www.wordfence.com/threat-intel/vulnerabilities/id/97108ad1-c7b8-4050-ba0d-7a1fd4bdedb3https://nvd.nist.gov/vuln/detail/CVE-2021-24256

Related records

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