octagonwebstudio Premium Addons for KingComposer Plugin up to 1.1.1 on WordPress AJAX add_custom_sidebar authorization

Summaryinfo

A vulnerability was found in octagonwebstudio Premium Addons for KingComposer Plugin up to 1.1.1 on WordPress. It has been declared as critical. Impacted is the function add_custom_sidebar of the component AJAX Handler. Such manipulation leads to authorization. This vulnerability is documented as CVE-2026-12349. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in octagonwebstudio Premium Addons for KingComposer Plugin up to 1.1.1 on WordPress. It has been rated as critical. Affected by this issue is the function add_custom_sidebar of the component AJAX Handler. The manipulation with an unknown input leads to a authorization vulnerability. Using CWE to declare the problem leads to CWE-862. The product does not perform an authorization check when an actor attempts to access a resource or perform an action. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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.

The weakness was released by Eason. The advisory is available at wordfence.com. This vulnerability is handled as CVE-2026-12349 since 06/15/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 06/30/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-40252). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• WordPress Plugin

Vendor

• octagonwebstudio

Name

• Premium Addons for KingComposer Plugin

Version

• 1.1.0
• 1.1.1

CPE 2.3info

• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒

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Threat Intelligenceinfo

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Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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