CVE-2021-24243

Name: CVE-2021-24243
Creator: NVD / NIST
Published: 2021-05-06T13:15:11.463+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.70%

Last modified Jun 17, 2026

CVE-2021-24243 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. An AJAX action registered by the WPBakery Page Builder (Visual Composer) Clipboard WordPress plugin before 4.5.6 did not have capability checks nor sanitization, allowing low privilege users (subscriber+) to call it and set XSS payloads, which will be triggered in all backend pages.. EPSS estimates a 0.70% chance of exploitation in the next 30 days.

Description

An AJAX action registered by the WPBakery Page Builder (Visual Composer) Clipboard WordPress plugin before 4.5.6 did not have capability checks nor sanitization, allowing low privilege users (subscriber+) to call it and set XSS payloads, which will be triggered in all backend pages.

Metrics

CVSS 3.1

5.4/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

0.70%

48.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Wpbakery Page Builder Clipboard Project	Wpbakery Page Builder Clipboard	>= 4.5.0, < 4.5.6

References

https://codecanyon.net/item/visual-composer-clipboard/8897711Product, Third Party Advisory
https://wpscan.com/vulnerability/3bc0733a-b949-40c9-a5fb-f56814fc4af3Exploit, Third Party Advisory
https://codecanyon.net/item/visual-composer-clipboard/8897711Product, Third Party Advisory
https://wpscan.com/vulnerability/3bc0733a-b949-40c9-a5fb-f56814fc4af3Exploit, Third Party Advisory

Timeline

Published: May 6, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-24243?

How severe is CVE-2021-24243?

CVE-2021-24243 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.70% probability of exploitation in the next 30 days.

How do I fix CVE-2021-24243?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-24243?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST