XSS in Patreon WordPress
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.018 (77.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 77th percentile — 77.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.018 · newest: 0.018 · change: 0.000
Affected products
- Patreon WordPress
- Patreon WordPress — versions 1.7.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- jetpack.com/2021/03/26/vulnerabilities-found-in-patreon-wordpress-plugin/ (Exploit, Third Party Advisory)
- wpscan.com/vulnerability/001755c4-add3-4566-a022-ab1f83546c1f (Third Party Advisory)
Frequently asked questions
- What is CVE-2021-24229?
- CVE-2021-24229 is a critical-severity vulnerability in Patreon WordPress, classified under Cross-site Scripting. CVSS score: 9.6/10. Published 2021-04-12.
- How severe is CVE-2021-24229?
- Critical severity. CVSS v3 base score is 9.6 out of 10.
- Is CVE-2021-24229 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.