XSS in Jconti Videozen
CVE-2026-6439
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.
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.002 (10.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N.
Affected products
- Jconti Videozen — versions 0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-6439?
- CVE-2026-6439 is a medium-severity vulnerability in Jconti Videozen, classified under Cross-site Scripting. CVSS score: 4.4/10. Published 2026-04-17.
- How severe is CVE-2026-6439?
- Medium severity. CVSS v3 base score is 4.4 out of 10.