CVE-2026-5400: Redux Framework <= 4.5.13 - Authenticated (Subscriber+) Cross-Site Scripting via User Input
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 usermetasave() 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.
Affected Software
Event History
Frequently Asked Questions
Can a low-privilege WordPress account exploit this issue?
Yes. An authenticated attacker with Subscriber-level access or higher can inject stored script through Media field filter values.
When would an injected payload execute?
The injected script executes when a user accesses a page containing the attacker-injected content.
Which versions require remediation?
Redux Framework plugin versions up to and including 4.5.13 are affected.