---
id: CVE-2026-5399
title: >-
  The Redux Framework plugin for WordPress is vulnerable to Stored Cross-Site
  Scripting via the Slider field in User Profile settings in versions up to and
  including 4.5.13.1
summary: >-
  The Redux Framework plugin for WordPress is vulnerable to Stored Cross-Site
  Scripting via the Slider field in User Profile settings in versions up to and
  including 4.5.13.1. This is due to insufficient input sanitization in the
  user_meta…
severity: medium
cvss: 6.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N'
cwe:
  - CWE-79
vendor: davidanderson
product: Redux Framework
affected:
  - redux_framework <= 4.5.13.1
published: '2026-09-10'
updated: '2026-09-10'
sourceUpdated: '2026-09-10T14:39:13.757'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-5399'
references:
  - url: 'https://github.com/reduxframework/redux-framework/pull/4112/changes'
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/redux-framework/tags/4.5.10/redux-core/inc/extensions/users/class-redux-extension-users.php#L1018
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/redux-framework/tags/4.5.10/redux-core/inc/fields/slider/class-redux-slider.php#L311
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/redux-framework/trunk/redux-core/inc/extensions/users/class-redux-extension-users.php#L1018
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/redux-framework/trunk/redux-core/inc/fields/slider/class-redux-slider.php#L311
    label: security@wordfence.com
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/31c554cf-eee9-45a8-8fb6-198978620204?source=cve
    label: security@wordfence.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-10T12:55:47.555159Z'
ingestedAt: '2026-09-10T09:45:12.032Z'
epss: 0.00349
epssPercentile: 0.25721
---

## Overview

The Redux Framework plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the Slider field in User Profile settings in versions up to and including 4.5.13.1. This is due to insufficient input sanitization in the user_meta_save() function (which only sanitizes array values, not scalar values) and improper output escaping in the Redux_Slider::render() method, which outputs slider values into unquoted HTML attributes. The vulnerability also exploits the fact that the clean_default() method only casts values to numeric types when they are empty or out of bounds, allowing malicious strings like '1 tabindex=0 autofocus onfocus=alert(1) x=' to pass validation through PHP's loose type comparison. This makes it possible for authenticated attackers, with Subscriber-level access and above, to inject arbitrary web scripts into their user profile that will execute whenever an Administrator navigates to view the attacker's profile page.

## Remediation

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