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CVE-2026-4302— WowOptin: Next-Gen Popup Maker <= 1.4.29 - Unauthenticated Server-Side Request Forgery via 'link' Parameter in REST API

Quick assessment

Affected
wpxpo WowOptin: Next-Gen Popup Maker – Create Stunning Popups and Optins for Lead Generation
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress plugin WowOptin: Next-Gen Popup Maker 1.4.29及之前版本存在代码问题漏洞，该漏洞源于公开的REST API端点缺少URL验证，可能导致服务端请求伪造。

CVSS 7.2 · High EPSS 0.48% · P39
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I. Basic Information for CVE-2026-4302

Vulnerability Information
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Vulnerability Title
WowOptin: Next-Gen Popup Maker <= 1.4.29 - Unauthenticated Server-Side Request Forgery via 'link' Parameter in REST API
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5
Vulnerability Title
WordPress plugin WowOptin: Next-Gen Popup Maker 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress plugin WowOptin: Next-Gen Popup Maker 1.4.29及之前版本存在代码问题漏洞，该漏洞源于公开的REST API端点缺少URL验证，可能导致服务端请求伪造。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
wpxpo WowOptin: Next-Gen Popup Maker – Create Stunning Popups and Optins for Lead Generation * ~ 1.4.29 -

II. Public POCs for CVE-2026-4302

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III. Intelligence Information for CVE-2026-4302

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Patches & Fixes for CVE-2026-4302 (9)

Vendor Advisories for CVE-2026-4302 (1)

IV. Related Vulnerabilities

Same product: WowOptin: Next-Gen Popup Maker – Create Stunning Popups and Optins for Lead Generation
Same vendor: wpxpo
Same weakness: CWE-918

V. Comments for CVE-2026-4302

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