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CVE-2026-4302

HIGH 7.2 CVSS 3.1
Published
March 21, 2026
Last modified
June 17, 2026
NVD status
Deferred
Reported by
security@wordfence.com
Weakness
CWE-918
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

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.

Affected WordPress components

  • WowOptin: Next-Gen Popup Maker – Create Stunning Popups and Optins for Lead Generation Plugin · optin
    Confirmed match Active
    Up to and including 1.4.29
    View on WordPress.org

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

  • wpxpo WowOptin: Next-Gen Popup Maker – Create Stunning Popups and Optins for Lead Generation — Up to and including 1.4.29

References

  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/optin/tags/1.4.23/frontend/class-rest-frontend.php#L44
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/optin/tags/1.4.23/frontend/class-rest-frontend.php#L55
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/optin/tags/1.4.23/includes/integrations/implementations/class-webhook.php#L38
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/optin/tags/1.4.23/includes/integrations/implementations/class-webhook.php#L45
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/optin/trunk/frontend/class-rest-frontend.php#L44
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/optin/trunk/frontend/class-rest-frontend.php#L55
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/optin/trunk/includes/integrations/implementations/class-webhook.php#L38
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/optin/trunk/includes/integrations/implementations/class-webhook.php#L45
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3484392%40optin&new=3484392%40optin&sfp_email=&sfph_mail=
  • www.wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/b1c3e480-0221-4913-bcce-f34ded9edca8?source=cve
  • nvd.nist.gov Official NVD record