CVE-2021-24241

Name: CVE-2021-24241
Creator: NVD / NIST
Published: 2021-04-22T21:15:09.893+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 1.39%

Last modified Jun 17, 2026

CVE-2021-24241 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. The Advanced Custom Fields Pro WordPress plugin before 5.9.1 did not properly escape the generated update URL when outputting it in an attribute, leading to a reflected Cross-Site Scripting issue in the update settings page.. EPSS estimates a 1.39% chance of exploitation in the next 30 days.

Description

The Advanced Custom Fields Pro WordPress plugin before 5.9.1 did not properly escape the generated update URL when outputting it in an attribute, leading to a reflected Cross-Site Scripting issue in the update settings page.

Metrics

CVSS 3.1

6.1/10

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

EPSS Probability

1.39%

68.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Advancedcustomfields	Advanced Custom Fields	< 5.9.1

References

https://github.com/jdordonezn/Reflected-XSS-in-WordPress-for-ACF-PRO-before-5.9.1-plugin/issues/1Exploit, Third Party Advisory
https://wpscan.com/vulnerability/d1e9c995-37bd-4952-b88e-945e02e3c83fExploit, Third Party Advisory
https://www.advancedcustomfields.com/blog/acf-5-9-1-release/Release Notes, Vendor Advisory
https://github.com/jdordonezn/Reflected-XSS-in-WordPress-for-ACF-PRO-before-5.9.1-plugin/issues/1Exploit, Third Party Advisory
https://wpscan.com/vulnerability/d1e9c995-37bd-4952-b88e-945e02e3c83fExploit, Third Party Advisory
https://www.advancedcustomfields.com/blog/acf-5-9-1-release/Release Notes, Vendor Advisory

Timeline

Published: Apr 22, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-24241?

How severe is CVE-2021-24241?

CVE-2021-24241 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 1.39% probability of exploitation in the next 30 days.

How do I fix CVE-2021-24241?

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-2021-24241?

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

Scan your code now

Source: NVD / NIST