CVE-2021-24292

Happy Addons for Elementor <= 2.23.0 & Pro Version < 1.17.0 - Stored Cross-Site Scripting

2021-04-26 00:00
Ram

Strategic Overview

Status
Patched in 2.24.0
Affected Plugin
HappyAddons for Elementor – 160 Elementor Widgets, GSAP Animations & Templates
Affected Version
< 2.24.0
CVSS
6.4Medium
Weakness type
CWE-79 · Improper Neutralization of Input During Web Page Generation
CVE
CVE-2021-24292
View all HappyAddons for Elementor – 160 Elementor Widgets, GSAP Animations & Templates vulnerabilities

At a glance

CVE-2021-24292 is a medium-severity Improper Neutralization of Input During Web Page Generation vulnerability in the HappyAddons for Elementor WordPress plugin, affecting versions < 2.24.0. It carries a CVSS score of 6.4 (reachable over the network; low attack complexity). The issue is fixed in version 2.24.0; sites on affected versions should update now. Disclosed April 2021, reported by Ram.

Vulnerability Overview

The Happy Addons for Elementor WordPress plugin before 2.24.0, Happy Addons Pro for Elementor WordPress plugin before 1.17.0 have a number of widgets that are vulnerable to stored Cross-Site Scripting(XSS) by lower-privileged users such as contributors, all via a similar method: The “Card” 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 with the “heading_tag” set to “script”, and the actual “title” parameter set to JavaScript to be executed within the script tags added by the “heading_tag” parameter.

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

HappyAddons for Elementor < 2.24.0 carries this weakness at Card, and reaching it 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 HappyAddons for Elementor the fix is 2.24.0: builds < 2.24.0 are affected, anything from 2.24.0 onward is not.

Remediation

Update to version 2.24.0, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to HappyAddons for Elementor: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: HappyAddons for Elementor 2.24.0 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2021-24292https://www.wordfence.com/threat-intel/vulnerabilities/id/f8ec4c5e-fb24-4b74-9ed8-0a9060625abahttps://nvd.nist.gov/vuln/detail/CVE-2021-24292

Related records

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