CVE-2026-12349: CWE-862 Missing Authorization in octagonwebstudio Premium Addons for KingComposer
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.
AI Analysis
Technical Summary
CVE-2026-12349 is a missing authorization vulnerability (CWE-862) in the Premium Addons for KingComposer WordPress plugin by octagonwebstudio. The issue arises because the add_custom_sidebar() and remove_custom_sidebar() AJAX handlers are exposed via wp_ajax_nopriv_* hooks without proper authorization or capability checks. These handlers directly update the octagon_custom_sidebar option using update_option(), enabling unauthenticated attackers to create or delete custom widget areas arbitrarily. This can disrupt widget functionality by causing widgets assigned to those sidebars to silently lose their registration and cease rendering. The vulnerability affects versions up to and including 1.1.1. No official patch or remediation guidance is currently available.
Potential Impact
An unauthenticated attacker can modify or delete custom sidebars in the affected plugin, leading to loss of widget registration and rendering on the WordPress site. This results in unauthorized modification of site content presentation but does not directly impact confidentiality or availability. The CVSS score of 5.3 reflects a medium impact primarily on integrity.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict access to AJAX endpoints if possible and monitor for unusual activity related to custom sidebar modifications. Avoid using affected versions in production environments if feasible.
CVE-2026-12349: CWE-862 Missing Authorization in octagonwebstudio Premium Addons for KingComposer
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.
CVSS v3.1
Score 5.3medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-12349 is a missing authorization vulnerability (CWE-862) in the Premium Addons for KingComposer WordPress plugin by octagonwebstudio. The issue arises because the add_custom_sidebar() and remove_custom_sidebar() AJAX handlers are exposed via wp_ajax_nopriv_* hooks without proper authorization or capability checks. These handlers directly update the octagon_custom_sidebar option using update_option(), enabling unauthenticated attackers to create or delete custom widget areas arbitrarily. This can disrupt widget functionality by causing widgets assigned to those sidebars to silently lose their registration and cease rendering. The vulnerability affects versions up to and including 1.1.1. No official patch or remediation guidance is currently available.
Potential Impact
An unauthenticated attacker can modify or delete custom sidebars in the affected plugin, leading to loss of widget registration and rendering on the WordPress site. This results in unauthorized modification of site content presentation but does not directly impact confidentiality or availability. The CVSS score of 5.3 reflects a medium impact primarily on integrity.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict access to AJAX endpoints if possible and monitor for unusual activity related to custom sidebar modifications. Avoid using affected versions in production environments if feasible.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Wordfence
- Date Reserved
- 2026-06-15T20:28:31.078Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a435dda27e9c79719305348
Added to database: 06/30/2026, 06:10:34 UTC
Last enriched: 06/30/2026, 06:21:32 UTC
Last updated: 06/30/2026, 23:26:03 UTC
Views: 15
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.