What is CVE-2026-12399?

CVE-2026-12399 is a medium-severity vulnerability in Jegstudio Gutenverse – Wordpress Blocks, Page Builder & Site Editor, classified under Cross-site Scripting. CVSS score: 4.4/10. Published 2026-06-27.

How severe is CVE-2026-12399?

Medium severity. CVSS v3 base score is 4.4 out of 10.

XSS in Jegstudio Gutenverse – Wordpress Blocks, Page Builder & Site Editor

CVE-2026-12399

The Gutenverse – WordPress Blocks, Page Builder & Site Editor plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings in all versions up to, and including, 3.8.0 due to insufficient input sanitization and outpu…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (15.8th 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

Jegstudio Gutenverse – Wordpress Blocks, Page Builder & Site Editor — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

Frequently asked questions

What is CVE-2026-12399?: CVE-2026-12399 is a medium-severity vulnerability in Jegstudio Gutenverse – Wordpress Blocks, Page Builder & Site Editor, classified under Cross-site Scripting. CVSS score: 4.4/10. Published 2026-06-27.
How severe is CVE-2026-12399?: Medium severity. CVSS v3 base score is 4.4 out of 10.