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.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
Low
Partial data leak
Integrity
Low
Partial data modification
Availability
None
No disruption
CVSS Vector v3.1
Weakness Type (CWE)
References 4
https://github.com/assetnote/blind-ssrf-chains
security@wordfence.com
https://plugins.trac.wordpress.org/browser/performance-monitor/tags/1.0.6/admin…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/performance-monitor/tags/1.0.6/inclu…
security@wordfence.com
https://www.wordfence.com/threat-intel/vulnerabilities/id/c8f42f17-bce2-421e-90…
security@wordfence.com