Redux Framework <= 4.5.13.1 - Authenticated (Subscriber+) Stored Cross-Site Scripting via Slider Field Value
Summary
| CVE | CVE-2026-5399 |
|---|---|
| State | PUBLISHED |
| Assigner | Wordfence |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-09-10 10:17:31 UTC |
| Updated | 2026-09-10 14:39:13 UTC |
| Description | 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. |
Risk And Classification
Primary CVSS: v3.1 6.4 MEDIUM from [email protected]
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
EPSS: 0.003340000 probability, percentile 0.265070000 (date 2026-09-12)
Problem Types: CWE-79 | CWE-79 CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Secondary | 6.4 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N |
| 3.1 | CNA | DECLARED | 6.4 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
ChangedConfidentiality
LowIntegrity
LowAvailability
NoneCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Davidanderson | Redux Framework | affected 4.5.13.1 semver | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| plugins.trac.wordpress.org/browser/redux-framework/tags/4.5.10/redux-core/inc/fields/sli... | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/redux-framework/tags/4.5.10/redux-core/inc/extensions... | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/redux-framework/trunk/redux-core/inc/extensions/users... | [email protected] | plugins.trac.wordpress.org | |
| www.wordfence.com/threat-intel/vulnerabilities/id/31c554cf-eee9-45a8-8fb6-19897... | [email protected] | www.wordfence.com | |
| github.com/reduxframework/redux-framework/pull/4112/changes | [email protected] | github.com | |
| plugins.trac.wordpress.org/browser/redux-framework/trunk/redux-core/inc/fields/slider/cl... | [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: h0xilo (en)
Additional Advisory Data
| Source | Time | Event |
|---|---|---|
| CNA | 2026-04-02T06:49:25.000Z | Vendor Notified |
| CNA | 2026-09-09T21:20:33.000Z | Disclosed |
There are currently no legacy QID mappings associated with this CVE.