What the vulnerability does
01Description
The Performance Monitor plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 1.0.6. This is due to insufficient validation of the 'url' parameter in the '/wp-json/performance-monitor/v1/curl_data' REST API endpoint. This makes it possible for unauthenticated attackers to make web requests to arbitrary locations, including internal services, via the Gopher protocol and other dangerous protocols. This can be exploited to achieve Remote Code Execution by chaining with services like Redis.
Explanation of Vulnerability in Simple Terms
02Summary
Performance Monitor versions 1.0.6 and earlier contain a server-side request forgery vulnerability. An attacker can make the affected application send HTTP requests to internal or external systems on the attacker's behalf. No authentication or user interaction is required. The vulnerability can leak sensitive information and modify data on systems the application can reach.
What an attacker can do
03Attacker Capabilities
Make the application send requests to internal systems or external servers to read data or trigger actions.
Potential impact on your site
04Site Impact
Attackers can access internal services, read sensitive data, or modify resources the application can reach.
Conditions required to exploit
05Prerequisites
Network access to the application. No authentication or user interaction required.
Key dates
06Disclosure timeline
March 21, 2026
CVE published
April 8, 2026
Record updated
