---
id: CVE-2026-6453
title: >-
  The CubeWP Framework plugin for WordPress is vulnerable to SQL Injection in
  all versions up to and including 1.1.30
summary: >-
  The CubeWP Framework plugin for WordPress is vulnerable to SQL Injection in
  all versions up to and including 1.1.30. This is due to insufficient input
  sanitization in the cubewp_remove_relation() AJAX function, specifically the
  use of wp…
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
published: '2026-08-01'
updated: '2026-08-01'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-6453'
references:
  - url: >-
      https://plugins.trac.wordpress.org/browser/cubewp-framework/tags/1.1.29/cube/functions/admin-functions.php#L2655
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/cubewp-framework/tags/1.1.29/cube/modules/custom-fields/class-cubewp-relationships.php#L251
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/cubewp-framework/tags/1.1.29/cube/modules/custom-fields/class-cubewp-relationships.php#L261
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/cubewp-framework/trunk/cube/functions/admin-functions.php#L2655
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/cubewp-framework/trunk/cube/modules/custom-fields/class-cubewp-relationships.php#L251
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/cubewp-framework/trunk/cube/modules/custom-fields/class-cubewp-relationships.php#L261
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/changeset?reponame=&old=3627740%40cubewp-framework&new=3627740%40cubewp-framework
    label: security@wordfence.com
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/a4647620-e06a-49d5-8f9d-a59cb5a999b1?source=cve
    label: security@wordfence.com
tags:
  - nvd
epss: 0.00472
epssPercentile: 0.38273
ingestedAt: '2026-08-02T05:17:48.690Z'
---

## Overview

The CubeWP Framework plugin for WordPress is vulnerable to SQL Injection in all versions up to and including 1.1.30. This is due to insufficient input sanitization in the cubewp_remove_relation() AJAX function, specifically the use of wp_unslash() on the relation_id parameter before interpolating it directly into a raw SQL query without using $wpdb->prepare(). The wp_unslash() call explicitly removes the backslash escaping that WordPress's wp_magic_quotes() adds to all $_POST data, neutralizing the only layer of SQL injection protection. The sanitize_text_field() function applied afterward offers no SQL protection. This makes it possible for authenticated attackers, with subscriber-level access and above, to append additional SQL queries to the existing query.

## Remediation

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