smub WPCode Plugin up to 2.3.5 on WordPress Shortcode wpcode_register_post_type code injection

Summaryinfo

A vulnerability identified as critical has been detected in smub WPCode Plugin up to 2.3.5 on WordPress. Affected by this issue is the function wpcode_register_post_type of the component Shortcode Handler. The manipulation leads to code injection. This vulnerability is uniquely identified as CVE-2026-8832. The attack is possible to be carried out remotely. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in smub WPCode Plugin up to 2.3.5 on WordPress and classified as critical. This issue affects the function wpcode_register_post_type of the component Shortcode Handler. The manipulation with an unknown input leads to a code injection vulnerability. Using CWE to declare the problem leads to CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

The WPCode - Insert Headers and Footers + Custom Code Snippets - WordPress Code Manager plugin for WordPress is vulnerable to Remote Code Execution in versions up to, and including, 2.3.5 This is due to the 'wpcode' custom post type being registered without a custom capability_type or capability restrictions in the wpcode_register_post_type() function, allowing WordPress core to fall back to standard post capabilities for all creation paths including XML-RPC. This makes it possible for authenticated attackers, with author-level access and above, to create and publish executable PHP snippet posts via XML-RPC wp.newPost, which are then executed server-side via eval() in the run_eval() function when the snippet is rendered through the [wpcode] shortcode.

The weakness was disclosed by Yongtae Jeon. It is possible to read the advisory at wordfence.com. The identification of this vulnerability is CVE-2026-8832 since 05/18/2026. The exploitation is known to be easy. The attack may be initiated remotely. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1059 according to MITRE ATT&CK.

Upgrading to version 2.3.5 eliminates this vulnerability.

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Productinfo

Type

• WordPress Plugin

Vendor

• smub

Name

• WPCode Plugin

Version

• 2.3.0
• 2.3.1
• 2.3.2
• 2.3.3
• 2.3.4
• 2.3.5

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CPE 2.2info

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