CVE-2021-24229

Name: CVE-2021-24229
Creator: NVD / NIST
Published: 2021-04-12T14:15:16.1+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.6/10EPSS 1.76%

Last modified Jun 17, 2026

CVE-2021-24229 is a critical-severity vulnerability rated 9.6/10 on the CVSS scale. The Jetpack Scan team identified a Reflected Cross-Site Scripting via the patreon_save_attachment_patreon_level AJAX action of the Patreon WordPress plugin before 1.7.2. This AJAX hook is used to update the pledge level required by Patreon subscribers to access a given attachment. EPSS estimates a 1.76% chance of exploitation in the next 30 days.

Description

The Jetpack Scan team identified a Reflected Cross-Site Scripting via the patreon_save_attachment_patreon_level AJAX action of the Patreon WordPress plugin before 1.7.2. This AJAX hook is used to update the pledge level required by Patreon subscribers to access a given attachment. This action is accessible for user accounts with the ‘manage_options’ privilege (i.e.., only administrators). Unfortunately, one of the parameters used in this AJAX endpoint is not sanitized before being printed back to the user, so the risk it represents is the same as the previous XSS vulnerability.

Metrics

CVSS 3.1

9.6/10

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

EPSS Probability

1.76%

75.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Patreon	Patreon Wordpress	< 1.7.2

References

https://jetpack.com/2021/03/26/vulnerabilities-found-in-patreon-wordpress-plugin/Exploit, Third Party Advisory
https://wpscan.com/vulnerability/001755c4-add3-4566-a022-ab1f83546c1fThird Party Advisory
https://jetpack.com/2021/03/26/vulnerabilities-found-in-patreon-wordpress-plugin/Exploit, Third Party Advisory
https://wpscan.com/vulnerability/001755c4-add3-4566-a022-ab1f83546c1fThird Party Advisory

Timeline

Published: Apr 12, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-24229?

How severe is CVE-2021-24229?

CVE-2021-24229 has a CVSS score of 9.6/10 (CRITICAL severity). The EPSS model estimates a 1.76% probability of exploitation in the next 30 days.

How do I fix CVE-2021-24229?

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-2021-24229?

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

Scan your code now

Source: NVD / NIST