CVE-2026-12349 Missing authorization in Premium Addons for KingComposer
Unauthenticated attackers can create or delete custom sidebars, causing widget loss and site display issues.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-12349?
CVE-2026-12349 is a medium-severity missing authorization vulnerability in octagonwebstudio Premium Addons for KingComposer, published on 30 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-862
Which versions are affected by CVE-2026-12349?
How do I fix CVE-2026-12349?
No fix has been published for CVE-2026-12349 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-12349 being exploited?
There is no known exploitation of CVE-2026-12349 in the wild and no public exploit code.
Sources
Also known as GHSA-7m2v-4f6c-h555.