Vulnerability Overview This page primarily introduces security hardening guidelines for the CentOS Web Panel (CWP), focusing on security risks related to PHP function disabling and file permission configuration. Scope of Impact PHP Function Abuse: If dangerous PHP functions are not disabled, attackers may exploit these functions to perform malicious operations. File Permission Leaks: If file permissions are not set correctly (e.g., not set to 640), it may significantly reduce the overall security of the server, making it vulnerable to hacker attacks outside of ModSecurity and FileSystemLock protections. Remediation Steps 1. Disable Dangerous PHP Functions: Reference Document: How to disable dangerous php functions Recommendation: If hosting multiple sites, it is recommended to configure options separately for each user. 2. Set File Permissions: Set the permissions of all files to 640. Operation Path: CWP Admin left menu -> User Accounts -> Fix Permissions. Related Code/Configuration The page does not contain specific Proof of Concept (PoC) code for exploitation, but provides the following key configuration examples: Modify tmpfs Security Settings (tmpfs Security) Edit the file and add the parameters: Change to: Limit MySQL Connections (MySQL/MariaDB Limit per user) Add the following line to the section in or : After adding, restart MySQL: