CVE-2020-15299: King-Theme Kingcomposer

Medium severity, CVSS 6.1. EPSS: 47% chance of exploitation in the next 30 days.

A reflected Cross-Site Scripting (XSS) Vulnerability in the KingComposer plugin through 2.9.4 for WordPress allows remote attackers to trick a victim into submitting an install_online_preset AJAX request containing base64-encoded JavaScript (in the kc-online-preset-data POST parameter) that is executed in the victim's browser.

Affected products

• King-Theme Kingcomposer: up to and including 2.9.4

Published 2020-07-09. Last modified 2026-06-17.