XSS in Advancedcustomfields Advanced Custom Fields
CVE-2021-24241
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.014 (71.3th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 71st percentile — 71.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000
Affected products
- Advancedcustomfields Advanced Custom Fields
- Advanced Custom Fields Pro — versions 5.9.1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- wpscan.com/vulnerability/d1e9c995-37bd-4952-b88e-945e02e3c83f (Exploit, Third Party Advisory)
- github.com/jdordonezn/Reflected-XSS-in-WordPress-for-ACF-PRO-before-5.9.1-plugi… (Exploit, Third Party Advisory)
- www.advancedcustomfields.com/blog/acf-5-9-1-release/ (Release Notes, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-24241?
- CVE-2021-24241 is a medium-severity vulnerability in Advancedcustomfields Advanced Custom Fields, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-04-22.
- How severe is CVE-2021-24241?
- Medium severity. CVSS v3 base score is 6.1 out of 10.
- Is CVE-2021-24241 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.