Unauthorized Data Modification in Premium Addons for KingComposer Plugin by WordPress
CVE-2026-12349

5.3MEDIUM

Key Information:

Vendor

WordPress
Status
Premium Addons For Kingcomposer
Vendor
CVE Published:
30 June 2026

What is CVE-2026-12349?

The Premium Addons for KingComposer plugin for WordPress is vulnerable due to insufficient authorization and capability checks in its AJAX handlers, specifically add_custom_sidebar() and remove_custom_sidebar(). This oversight allows unauthenticated attackers to manipulate the octagon_custom_sidebar option directly, leading to the potential creation of arbitrary custom widget areas or the deletion of existing custom sidebars. As a result, widgets linked to these areas may become unregistered and stop rendering, causing disruption in website functionality.

Affected Version(s)

Premium Addons for KingComposer 0 <= 1.1.1

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://plugins.trac.wordpress.org/browser/premium-addons...
https://plugins.trac.wordpress.org/browser/premium-addons...

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Eason
.