CVE-2021-4394Public exploitNetwork attack vector

Custom-field metadata modification via missing nonce validation

Published Jul 1, 2023 · Updated Apr 8, 2026

Cross-site request forgery in richardgabriel Locations 3.2.1 and earlier allows remote attackers to update custom-field metadata. The saveCustomFields() function processes a forged request without valid WordPress nonce verification and writes submitted custom-field metadata. Exploitation requires an administrator to submit the forged request, such as by following a malicious link, and is limited to unauthorized metadata changes.

CVSS severity4.3
Medium
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site request forgery in richardgabriel Locations 3.2.1 and earlier allows remote attackers to update custom-field metadata. The saveCustomFields() function processes a forged request without valid WordPress nonce verification and writes submitted custom-field metadata. Exploitation requires an administrator to submit the forged request, such as by following a malicious link, and is limited to unauthorized metadata changes.

The record

CVE
CVE-2021-4394
Published
Jul 1, 2023
Updated
Apr 8, 2026
Vendor
richardgabriel
Product
Locations
Classifications
T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 1, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=3.2.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

richardgabriel · Locationsversion=0 <=3.2.1

Published CVSS scores

4.3WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1204.001Malicious Link

Public exploit references

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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