wpxpo WowOptin Plugin up to 1.4.29 on WordPress REST API Endpoint integration-action wp_remote_get/wp_remote_post server-side request forgery

Summaryinfo

A vulnerability was found in wpxpo WowOptin Plugin up to 1.4.29 on WordPress. It has been rated as critical. This impacts the function wp_remote_get/wp_remote_post of the file /optn/v1/integration-action of the component REST API Endpoint. The manipulation leads to server-side request forgery. This vulnerability is listed as CVE-2026-4302. The attack may be initiated remotely. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as critical, has been found in wpxpo WowOptin Plugin up to 1.4.29 on WordPress. This issue affects the function wp_remote_get/wp_remote_post of the file /optn/v1/integration-action of the component REST API Endpoint. The manipulation with an unknown input leads to a server-side request forgery vulnerability. Using CWE to declare the problem leads to CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

The WowOptin: Next-Gen Popup Maker plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 1.4.29. This is due to the plugin exposing a publicly accessible REST API endpoint (optn/v1/integration-action) with a permission_callback of __return_true that passes user-supplied URLs directly to wp_remote_get() and wp_remote_post() in the Webhook::add_subscriber() method without any URL validation or restriction. The plugin does not use wp_safe_remote_get/post which provide built-in SSRF protection. This makes it possible for unauthenticated attackers to make web requests to arbitrary locations originating from the web application, which can be used to query and modify information from internal services.

The weakness was presented by Itthidej Aramsri. It is possible to read the advisory at wordfence.com. The identification of this vulnerability is CVE-2026-4302 since 03/16/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 1.4.23 eliminates this vulnerability.

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Productinfo

Type

• WordPress Plugin

Vendor

• wpxpo

Name

• WowOptin Plugin

Version

• 1.4.0
• 1.4.1
• 1.4.2
• 1.4.3
• 1.4.4
• 1.4.5
• 1.4.6
• 1.4.7
• 1.4.8
• 1.4.9
• 1.4.10
• 1.4.11
• 1.4.12
• 1.4.13
• 1.4.14
• 1.4.15
• 1.4.16
• 1.4.17
• 1.4.18
• 1.4.19
• 1.4.20
• 1.4.21
• 1.4.22
• 1.4.23
• 1.4.24
• 1.4.25
• 1.4.26
• 1.4.27
• 1.4.28
• 1.4.29

CPE 2.3info

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CPE 2.2info

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