---
id: CVE-2026-9855
title: >-
  The Custom Field Template plugin for WordPress is vulnerable to generic SQL
  Injection via the 'post_ID' parameter in all versions up to, and including,
  2.7.8 due to insufficient escaping on the user supplied parameter and lack of
  suffici…
summary: >-
  The Custom Field Template plugin for WordPress is vulnerable to generic SQL
  Injection via the 'post_ID' parameter in all versions up to, and including,
  2.7.8 due to insufficient escaping on the user supplied parameter and lack of
  suffici…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-89
vendor: hiroaki-miyashita
product: Custom Field Template
affected:
  - custom_field_template <= 2.7.8
published: '2026-09-19'
updated: '2026-09-21'
sourceUpdated: '2026-09-21T13:33:33.387'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-9855'
references:
  - url: >-
      https://plugins.trac.wordpress.org/browser/custom-field-template/tags/2.7.7/custom-field-template.php#L105
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/custom-field-template/tags/2.7.7/custom-field-template.php#L3353
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/custom-field-template/tags/2.7.7/custom-field-template.php#L3479
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/custom-field-template/tags/2.7.7/custom-field-template.php#L4442
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/custom-field-template/tags/2.7.8/custom-field-template.php#L105
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/custom-field-template/tags/2.7.8/custom-field-template.php#L3353
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/custom-field-template/tags/2.7.8/custom-field-template.php#L3479
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/custom-field-template/tags/2.7.8/custom-field-template.php#L4442
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/changeset?reponame=&old=3589466%40custom-field-template&new=3589466%40custom-field-template
    label: security@wordfence.com
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/ce924708-935a-45c0-8959-dd122632cef4?source=cve
    label: security@wordfence.com
tags:
  - nvd
  - cve.org
epss: 0.00344
epssPercentile: 0.28071
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-19T13:25:43.839923Z'
ingestedAt: '2026-09-19T07:59:56.107Z'
---

## Overview

The Custom Field Template plugin for WordPress is vulnerable to generic SQL Injection via the 'post_ID' parameter in all versions up to, and including, 2.7.8 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for authenticated attackers, with contributor-level access and above, to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database. The capability check via current_user_can('edit_post', $id) is bypassable because WordPress internally casts $id to an integer for the permission evaluation while the full unsanitized string is preserved and passed to the SQL sink, and a valid nonce — which is also required — can be legitimately obtained by any Contributor-level user from the post edit screen.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.