CVE-2026-4066Network attack vector

Private post disclosure via unchecked relational search

Published Mar 23, 2026 · Updated Mar 23, 2026

Missing authorization in Smart Custom Fields 5.0.6 and earlier allows remote authenticated users to read private and draft posts. The relational_posts_search() function queries with post_status=any and returns full WP_Post objects without checking read access for each result. Contributor-level access is sufficient to invoke the AJAX action and expose other authors' unpublished post content, without reported write access.

CVSS severity4.3
Medium
EPSS probability0.29%
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 Smart Custom Fields 5.0.6 and earlier allows remote authenticated users to read private and draft posts. The relational_posts_search() function queries with post_status=any and returns full WP_Post objects without checking read access for each result. Contributor-level access is sufficient to invoke the AJAX action and expose other authors' unpublished post content, without reported write access.

The record

CVE
CVE-2026-4066
Published
Mar 23, 2026
Updated
Mar 23, 2026
Vendor
Takashi Kitajima
Product
Smart Custom Fields
Classifications
CWE-862, T1213
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 23, 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=* <=5.0.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Takashi Kitajima · Smart Custom Fieldsversion=* <=5.0.6

Published CVSS scores

4.3WordfenceCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
T1213Data from Information Repositories

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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