Custom Field Template <= 2.7.8 - Authenticated (Contributor+) SQL Injection via 'post_ID' Parameter

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-9855
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-19 08:16:55 UTC
Updated2026-09-21 13:33:33 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v3.1 6.5 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS: 0.003440000 probability, percentile 0.280670000 (date 2026-09-22)

Problem Types: CWE-89 | CWE-89 CWE-89 Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
3.1CNADECLARED6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Hiroaki-miyashita Custom Field Template affected 2.7.8 semver Not specified

References

ReferenceSourceLinkTags
www.wordfence.com/threat-intel/vulnerabilities/id/ce924708-935a-45c0-8959-dd122... [email protected] www.wordfence.com
plugins.trac.wordpress.org/browser/custom-field-template/tags/2.7.8/custom-field-templat... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/custom-field-template/tags/2.7.7/custom-field-templat... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/custom-field-template/tags/2.7.8/custom-field-templat... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/custom-field-template/tags/2.7.7/custom-field-templat... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/custom-field-template/tags/2.7.7/custom-field-templat... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/custom-field-template/tags/2.7.8/custom-field-templat... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/changeset [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/custom-field-template/tags/2.7.8/custom-field-templat... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/custom-field-template/tags/2.7.7/custom-field-templat... [email protected] plugins.trac.wordpress.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Luc Huynh from Noventiq RedTeam (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-09-18T18:50:05.000ZDisclosed

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