Punnel Plugin up to 1.3.1 on WordPress admin-ajax.php save_config authorization

Summaryinfo

A vulnerability labeled as critical has been found in Punnel Plugin up to 1.3.1 on WordPress. This affects the function save_config of the file admin-ajax.php. Executing a manipulation can lead to authorization. This vulnerability is tracked as CVE-2026-3645. The attack can be launched remotely. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Punnel Plugin up to 1.3.1 on WordPress. It has been declared as critical. This vulnerability affects the function save_config of the file admin-ajax.php. The manipulation with an unknown input leads to a authorization vulnerability. The CWE definition for the vulnerability is CWE-862. The product does not perform an authorization check when an actor attempts to access a resource or perform an action. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

The Punnel – Landing Page Builder plugin for WordPress is vulnerable to Missing Authorization in all versions up to, and including, 1.3.1. The save_config() function, which handles the 'punnel_save_config' AJAX action, lacks any capability check (current_user_can()) and nonce verification. This makes it possible for authenticated attackers, with Subscriber-level access and above, to overwrite the plugin's entire configuration including the API key via a POST request to admin-ajax.php. Once the API key is known (because the attacker set it), the attacker can use the plugin's public API endpoint (sniff_requests() at /?punnel_api=1) — which only validates requests by comparing a POST token against the stored api_key — to create, update, or delete arbitrary posts, pages, and products on the site.

The weakness was disclosed by Phong Nguyen. The advisory is available at wordfence.com. This vulnerability was named CVE-2026-3645 since 03/06/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit.

By approaching the search of inurl:admin-ajax.php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 1.3.1 eliminates this vulnerability.

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Productinfo

Type

• WordPress Plugin

Name

• Punnel Plugin

Version

• 1.3.0
• 1.3.1

CPE 2.3info

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• 🔒

CPE 2.2info

• 🔒
• 🔒

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