CVE-2021-20866
6.5 · MEDIUMOverview
CVE-2021-20866 is a medium-severity vulnerability affecting advancedcustomfields advanced_custom_fields. It was published on December 13, 2021 and has a CVSS 3.1 base score of 6.5 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
Technical Description
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.
Remediation
Check the references section for vendor advisories and patches from advancedcustomfields. Update advanced_custom_fields to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| advancedcustomfields | advanced_custom_fields | >= 0, < 5.11 | Affected |
Frequently Asked Questions
What is CVE-2021-20866?
CVE-2021-20866 is a medium-severity vulnerability affecting advancedcustomfields advanced_custom_fields. It was published on December 13, 2021 and has a CVSS 3.1 base score of 6.5 (MEDIUM).
How severe is CVE-2021-20866?
This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2021-20866?
Check the references section for vendor advisories and patches from advancedcustomfields. Update advanced_custom_fields to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2021-20866?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-20866 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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