Executive Summary
The ProfilePress WordPress plugin, specifically versions before 4.17.2, contains an unauthenticated remote code execution vulnerability. This flaw allows unauthenticated attackers to install and activate arbitrary plugins by brute-forcing a weak 32-bit connect token via the ppress_connect_process AJAX handler. The vulnerability has a CVSS score of 8.1, indicating high severity.
Technical Analysis
The vulnerability class of this issue is unauthenticated remote code execution. The attack vector involves supplying a caller-controlled URL through the file request parameter to trigger silent plugin installation and activation. This achieves PHP code execution as the web-server user. The root cause is a weak 32-bit connect token and insufficient validation of the file request parameter.
How It Gets Exploited
An unauthenticated remote attacker on the same network can exploit this vulnerability. The attacker would send a crafted request to the ppress_connect_process AJAX handler, supplying a malicious URL through the file request parameter. This triggers the installation and activation of an arbitrary plugin, leading to PHP code execution as the web-server user. The attacker can then potentially pivot to internal databases or achieve further exploitation.
Impact Assessment
The ProfilePress WordPress plugin versions before 4.17.2 are affected. An attacker can achieve PHP code execution as the web-server user, potentially leading to arbitrary code execution, data exfiltration, or privilege escalation. The CVSS score of 8.1 indicates high severity.
Recommended Actions
To mitigate this vulnerability, update the ProfilePress plugin to version 4.17.2 or later. Additionally, implement network segmentation, restrict access to the WordPress installation, and monitor for suspicious activity. Consider implementing a Web Application Firewall (WAF) to detect and prevent exploitation attempts.
Sources
- National Vulnerability Database (NVD)
- Vulncheck.com