Redux Framework <= 4.5.13 - Authenticated (Subscriber+) Cross-Site Scripting via User Input
Strategic Overview
- Status
- Patched in 4.5.14
- Affected Plugin
- Redux Framework
- Affected Version
<= 4.5.13- CVSS
- 6.4Medium
- Weakness type
- CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
- CVE
CVE-2026-5400
At a glance
CVE-2026-5400 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the Redux Framework WordPress plugin, affecting versions <= 4.5.13. It carries a CVSS score of 6.4 (reachable over the network; low attack complexity). Exploitation requires an authenticated account at Subscriber level or above. The issue is fixed in version 4.5.14; sites on affected versions should update now. Disclosed September 2026, reported by h0xilo.
Vulnerability Overview
The Redux Framework plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the Media field filter values in versions up to, and including, 4.5.13 This is due to insufficient input sanitization of nested array values in the user_meta_save() function and unsafe output of filter CSS values in the render() function without proper escaping. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Technical Analysis
The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no interaction from a victim user.
CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Redux Framework <= 4.5.13 carries this weakness at user_meta_save(), and reaching it takes an account at Subscriber level or above. Cross-site scripting happens when input from a request is written into a page without being escaped for the context it lands in, so the browser parses attacker-supplied text as markup or script.
Injected script runs with the privileges of whoever views the affected page, which is how these flaws turn into administrator session theft, silent account creation or persistent backdoors in page content. For Redux Framework the fix is 4.5.14: builds <= 4.5.13 are affected, anything from 4.5.14 onward is not.
Remediation
Update to version 4.5.14, or a newer patched version
How does WordSec protect against this?
An attacker needs Subscriber access first, so the firewall sees the attempt as traffic from a logged-in account: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Redux Framework 4.5.14 closes this, and updating the plugin is the step that ends it.
- Firewall
- Alerts
External References
Related records
Same weakness class
- 7.2CVE-2024-6828: Redux Framework 4.4.12 - 4.4.17 JSON File Upload
CVE-2024-6828 - 6.4CVE-2026-5410: Redux Framework <= 4.5.13 Stored Cross-Site Scripting
CVE-2026-5410 - 6.4CVE-2026-5399: Redux Framework <= 4.5.13.1 Stored Cross-Site Scripting
CVE-2026-5399 - 6.4CVE-2025-9488: Redux Framework <= 4.5.8 Stored Cross-Site Scripting
CVE-2025-9488
Other vulnerabilities in Redux Framework
- 8.8CVE-2026-12525: Redux Framework <= 4.5.12 Privilege Escalation
CVE-2026-12525 - 8.8Gutenberg Template and Pattern Library & Redux Framework CSRF
- 7.1CVE-2021-38312: Gutenberg Template Library… Incorrect Authorization
CVE-2021-38312 - 5.3CVE-2021-38314: Gutenberg Template Library & Redux… Info Disclosure
CVE-2021-38314 - 5.3Gutenberg Template Library & Redux Framework <= 4.1.23 CSRF
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