CVE-2026-5400 Redux Framework <= 4.5.13 - Authenticated (Subscriber+) Cross-Site Scripting via User Input
Authenticated attackers can inject arbitrary web scripts via Media field filters in Redux Framework, leading to stored XSS execution on victim pages.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-5400?
CVE-2026-5400 is a medium-severity cross-site scripting vulnerability in davidanderson Redux Framework, published on 19 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-79
Which versions are affected by CVE-2026-5400?
How do I fix CVE-2026-5400?
No fix has been published for CVE-2026-5400 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-5400 being exploited?
There is no known exploitation of CVE-2026-5400 in the wild and no public exploit code.
Sources
Also known as GHSA-hgrh-m798-2mwh.