CVE-2026-4812Network attack vector

Unauthenticated content disclosure via client-controlled AJAX filters

Published Apr 15, 2026 · Updated Apr 15, 2026

Missing authorization in Advanced Custom Fields 6.7.0 and earlier allows remote attackers to disclose restricted WordPress content. The User, Post Object, Page Link, and Relationship AJAX handlers accept client-supplied filters that override configured role, post-status, post-type, and taxonomy restrictions. Exposure requires a reachable frontend ACF form; attackers can enumerate draft or private posts and restricted post types but cannot modify them through this flaw.

CVSS severity5.3
Medium
EPSS probability0.91%
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 6.7.0 and earlier allows remote attackers to disclose restricted WordPress content. The User, Post Object, Page Link, and Relationship AJAX handlers accept client-supplied filters that override configured role, post-status, post-type, and taxonomy restrictions. Exposure requires a reachable frontend ACF form; attackers can enumerate draft or private posts and restricted post types but cannot modify them through this flaw.

The record

CVE
CVE-2026-4812
Published
Apr 15, 2026
Updated
Apr 15, 2026
Vendor
WP Engine
Product
Advanced Custom Fields
Classifications
CWE-862
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 15, 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 <=6.7.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

WP Engine · Advanced Custom Fieldsversion=0 <=6.7.0

Published CVSS scores

5.3WordfenceCVSS:3.1/AV:N/AC:L/PR:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization

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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