CVE-2026-4302: CWE-918 Server-Side Request Forgery (SSRF) in wpxpo WowOptin: Next-Gen Popup Maker – Create Stunning Popups and Optins for Lead Generation
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.
AI Analysis
Technical Summary
The WowOptin WordPress plugin contains an SSRF vulnerability due to its REST API endpoint (optn/v1/integration-action) having a permission callback that always returns true, allowing unauthenticated access. The endpoint passes user-supplied URLs directly to wp_remote_get() and wp_remote_post() functions in the Webhook::add_subscriber() method without validation or use of safer alternatives like wp_safe_remote_get/post. This enables attackers to make arbitrary HTTP requests from the server, potentially accessing or modifying internal network resources.
Potential Impact
An unauthenticated attacker can exploit this SSRF vulnerability to make arbitrary HTTP requests from the vulnerable server to internal or external systems. This may allow the attacker to access sensitive internal services or modify information accessible via these requests. The CVSS score of 7.2 indicates a high impact on confidentiality and integrity, with no impact on availability. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to the vulnerable REST API endpoint if possible, and consider disabling the WowOptin plugin if it is not essential. Monitor for updates from the vendor regarding patches or official mitigations.
CVE-2026-4302: CWE-918 Server-Side Request Forgery (SSRF) in wpxpo WowOptin: Next-Gen Popup Maker – Create Stunning Popups and Optins for Lead Generation
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.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The WowOptin WordPress plugin contains an SSRF vulnerability due to its REST API endpoint (optn/v1/integration-action) having a permission callback that always returns true, allowing unauthenticated access. The endpoint passes user-supplied URLs directly to wp_remote_get() and wp_remote_post() functions in the Webhook::add_subscriber() method without validation or use of safer alternatives like wp_safe_remote_get/post. This enables attackers to make arbitrary HTTP requests from the server, potentially accessing or modifying internal network resources.
Potential Impact
An unauthenticated attacker can exploit this SSRF vulnerability to make arbitrary HTTP requests from the vulnerable server to internal or external systems. This may allow the attacker to access sensitive internal services or modify information accessible via these requests. The CVSS score of 7.2 indicates a high impact on confidentiality and integrity, with no impact on availability. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to the vulnerable REST API endpoint if possible, and consider disabling the WowOptin plugin if it is not essential. Monitor for updates from the vendor regarding patches or official mitigations.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Wordfence
- Date Reserved
- 2026-03-16T20:15:15.092Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 69bdff57f4197a8e3b623666
Added to database: 3/21/2026, 2:15:51 AM
Last enriched: 4/9/2026, 11:38:03 AM
Last updated: 4/30/2026, 11:44:45 AM
Views: 113
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