How severe is CVE-2021-24229?

CVE-2021-24229 has a CVSS 3.x base score of 9.6, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-24229 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-24229?

CVE-2021-24229 affects Patreon Patreon Wordpress. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-24229?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2021-24229 published?

CVE-2021-24229 was published on 2021-04-12 and last updated on 2026-06-17.

CVE-2021-24229

CVE-2021-24229 is a critical-severity vulnerability in Patreon Patreon Wordpress with a CVSS 3.x base score of 9.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Critical (CVSS 3.x base score 9.6)
CVSS v2: 6.8
EPSS exploit prediction: 2% (75th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Patreon Patreon Wordpress
Published: 2021-04-12
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2021-24229?: 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.
How severe is CVE-2021-24229?: CVE-2021-24229 has a CVSS 3.x base score of 9.6, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-24229 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-24229?: CVE-2021-24229 affects Patreon Patreon Wordpress. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-24229?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-24229 published?: CVE-2021-24229 was published on 2021-04-12 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:patreon:patreon_wordpress:*:*:*:*:*:wordpress:*:*

More vulnerabilities in Patreon Patreon Wordpress

CVE-2018-20984 — Critical (CVSS 9.8): The patreon-connect plugin before 1.2.2 for WordPress has Object Injection.
CVE-2021-24228 — Critical (CVSS 9.6): The Jetpack Scan team identified a Reflected Cross-Site Scripting in the Login Form of the Patreon WordPress plugin…
CVE-2021-24230 — High (CVSS 8.1): The Jetpack Scan team identified a Cross-Site Request Forgery vulnerability in the Patreon WordPress plugin before…
CVE-2021-24227 — High (CVSS 7.5): The Jetpack Scan team identified a Local File Disclosure vulnerability in the Patreon WordPress plugin before 1.7.0…
CVE-2021-24231 — Medium (CVSS 6.5): The Jetpack Scan team identified a Cross-Site Request Forgery vulnerability in the Patreon WordPress plugin before…
CVE-2021-25026 — Medium (CVSS 5.5): The Patreon WordPress plugin before 1.8.2 does not sanitise and escape the field "Custom Patreon Page name", which…

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