CVE-2021-20866

MEDIUM
Published Dec 13, 20214y ago · Modified Jun 17, 20261w ago
6.5 CVSS 3.1
Medium
Find Similar
Published Dec 13, 2021 4y ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
6.5
Exploitability
2.8
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity None
Availability None

Threat Intelligence

No active exploitation signals — not in CISA KEV and no EPSS score yet.

Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-862 Missing Authorization Authorization

Affected Products 2

VendorProductVersionRange
advancedcustomfieldsadvanced_custom_fields* <5.11
advancedcustomfieldsadvanced_custom_fields* <5.11

References 3

  • jvn.jp https://jvn.jp/en/jp/JVN09136401/index.html
    Third Party Advisory
  • wordpress.org https://wordpress.org/plugins/advanced-custom-fields/
    Third Party Advisory
  • advancedcustomfields.com https://www.advancedcustomfields.com/
    Vendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.