CVE-2026-6439 Cross-site scripting in VideoZen
Administrators can inject scripts into VideoZen settings, executing code for other users viewing the page.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-6439?
CVE-2026-6439 is a medium-severity cross-site scripting vulnerability in jconti VideoZen, published on 17 Apr 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
The VideoZen plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions up to and including 1.0.1. This is due to insufficient input sanitization and output escaping in the videozen_conf() function. The 'lang' POST parameter is stored directly via update_option() without any sanitization, and later echoed inside a <textarea> element without applying esc_textarea() or any equivalent escaping function. This makes it possible for authenticated attackers with Administrator-level access and above to inject arbitrary web scripts into the plugin settings page that will execute whenever any user accesses that page.
Weakness: CWE-79
Which versions are affected by CVE-2026-6439?
How do I fix CVE-2026-6439?
No fix has been published for CVE-2026-6439 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-2026-6439 being exploited?
There is no known exploitation of CVE-2026-6439 in the wild and no public exploit code.
Sources
Also known as GHSA-gc8m-6q8j-fh75.