CVE-2026-12349
MediumCVSS 5.3Exploitation Probability (EPSS)
Low risk15th percentile — higher than 15% of all known CVEs
Summary
The Premium Addons for KingComposer plugin for WordPress up to version 1.1.1 is vulnerable to unauthorized modification and data loss. Missing authorization and capability checks in the add_custom_sidebar() and remove_custom_sidebar() AJAX handlers allow unauthenticated attackers to create or delete custom widget areas, potentially causing widgets to silently lose registration and stop rendering.
Risk Assessment
The risk involves an attacker being able to arbitrarily modify the site layout, potentially disrupting site functionality, causing widget loss, and negatively impacting user experience and service operation.
Recommendation
Immediately update the Premium Addons for KingComposer plugin to the latest available version that includes security fixes. If no update is available, temporarily disable the plugin until a patch is released.
Original NVD description (English source)
The Premium Addons for KingComposer plugin for WordPress is vulnerable to unauthorized modification and loss of data in versions up to, and including, 1.1.1. This is due to missing authorization and capability checks on the add_custom_sidebar() and remove_custom_sidebar() AJAX handlers, both of which are exposed through wp_ajax_nopriv_* hooks and write directly to the octagon_custom_sidebar option via update_option(). This makes it possible for unauthenticated attackers to create arbitrary custom widget areas or delete existing custom sidebars, which can cause widgets assigned to those areas to silently lose their registration and stop rendering.