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CVE-2026-9855

MEDIUM 6.5 CVSS 3.1
Published
September 19, 2026
Last modified
September 21, 2026
NVD status
Deferred
Reported by
security@wordfence.com
Weakness
CWE-89
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Description

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.

Affected WordPress components

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

  • hiroaki-miyashita Custom Field Template — Up to and including 2.7.8

References

  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/custom-field-template/tags/2.7.7/custom-field-template.php#L105
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/custom-field-template/tags/2.7.7/custom-field-template.php#L3353
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/custom-field-template/tags/2.7.7/custom-field-template.php#L3479
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/custom-field-template/tags/2.7.7/custom-field-template.php#L4442
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/custom-field-template/tags/2.7.8/custom-field-template.php#L105
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/custom-field-template/tags/2.7.8/custom-field-template.php#L3353
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/custom-field-template/tags/2.7.8/custom-field-template.php#L3479
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/custom-field-template/tags/2.7.8/custom-field-template.php#L4442
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/changeset?reponame=&old=3589466%40custom-field-template&new=3589466%40custom-field-template
  • www.wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/ce924708-935a-45c0-8959-dd122632cef4?source=cve
  • nvd.nist.gov Official NVD record