CVE-2022-4324Public exploitNetwork attack vector

Admin-level object injection via unsafe import deserialization

Published Jan 2, 2023 · Updated Apr 10, 2025

PHP object injection in Hiroaki Miyashita Custom Field Template before 2.5.8 allows remote authenticated users to invoke object methods. The Import Options handler passes uploaded Customizer Styling file content to PHP deserialization without restricting object creation. A high-privilege WordPress account and a suitable gadget chain already present on the site are required; resulting effects follow that chain.

CVSS severity7.2
High
EPSS probability17.69%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

PHP object injection in Hiroaki Miyashita Custom Field Template before 2.5.8 allows remote authenticated users to invoke object methods. The Import Options handler passes uploaded Customizer Styling file content to PHP deserialization without restricting object creation. A high-privilege WordPress account and a suitable gadget chain already present on the site are required; resulting effects follow that chain.

The record

CVE
CVE-2022-4324
Published
Jan 2, 2023
Updated
Apr 10, 2025
Vendor
Hiroaki Miyashita
Product
Custom Field Template
Classifications
CWE-502, T1190
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jan 2, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 10, 2025Record 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 <2.5.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Hiroaki Miyashita · Custom Field Templateversion=0 <2.5.8

Published CVSS scores

7.2CISA-ADPCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
7.2NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
T1190Exploit Public-Facing Application

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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