Auth bypass in Advancedcustomfields Advanced Custom Fields
CVE-2021-20866
Advanced Custom Fields versions prior to 5.11 and Advanced Custom Fields Pro versions prior to 5.11 contain a missing authorization vulnerability in obtaining the user list which may allow a user to obtain the unauthorized information via unspecified vectors.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.017 (75.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 76th percentile — 75.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.017 · newest: 0.017 · change: 0.000
Affected products
- Advancedcustomfields Advanced Custom Fields
- Delicious Brains Advanced Custom Fields And Pro — versions versions prior to 5.11
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.advancedcustomfields.com/ (Vendor Advisory)
- wordpress.org/plugins/advanced-custom-fields/ (Third Party Advisory)
- jvn.jp/en/jp/JVN09136401/index.html (Third Party Advisory)
Frequently asked questions
- What is CVE-2021-20866?
- CVE-2021-20866 is a medium-severity vulnerability in Advancedcustomfields Advanced Custom Fields, classified under Missing Authorization. CVSS score: 6.5/10. Published 2021-12-13.
- How severe is CVE-2021-20866?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2021-20866 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.