CVE-2021-20867Network attack vector

Authenticated field-group relocation via missing authorization

Published Dec 13, 2021 · Updated Aug 3, 2024

Missing authorization in Advanced Custom Fields and Advanced Custom Fields Pro before 5.11 allows remote authenticated users to move field groups. JPCERT/CC identifies the field-group movement operation but does not disclose the responsible handler or the omitted permission check. Subscriber, Contributor, or Author access is sufficient, and the bounded consequence is unauthorized relocation of field groups.

CVSS severity4.3
Medium
EPSS probability1.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in Advanced Custom Fields and Advanced Custom Fields Pro before 5.11 allows remote authenticated users to move field groups. JPCERT/CC identifies the field-group movement operation but does not disclose the responsible handler or the omitted permission check. Subscriber, Contributor, or Author access is sufficient, and the bounded consequence is unauthorized relocation of field groups.

The record

CVE
CVE-2021-20867
Published
Dec 13, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-862, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 13, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.0JPCERT/CCAV:N/AC:L/Au:S/C:N/I:P/A:N
4.3JPCERT/CCCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
4.0NIST NVDAV:N/AC:L/Au:S/C:N/I:P/A:N
6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
T1565.001Stored Data Manipulation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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