CVE-2025-60730
📋 TL;DR
PerfreeBlog v4.0.11 contains an arbitrary file deletion vulnerability in the unInstallTheme function that allows attackers to delete files on the server. This affects all installations of PerfreeBlog v4.0.11 that have the vulnerable function accessible. Attackers could potentially delete critical system files or application components.
💻 Affected Systems
- PerfreeBlog
📦 What is this software?
Perfreeblog by Perfree
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise through deletion of critical operating system files, leading to service disruption, data loss, or system takeover.
Likely Case
Deletion of web application files causing service disruption, loss of website functionality, or deletion of user-uploaded content.
If Mitigated
Limited to deletion of non-critical files within the web application directory if proper file permissions are configured.
🎯 Exploit Status
Exploitation requires access to the theme management functionality. The vulnerability is documented in public repositories with technical details.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://perfree.org.cn/
Restart Required: No
Instructions:
1. Check vendor website for security updates. 2. If patch available, download and apply. 3. Verify fix by testing the unInstallTheme function.
🔧 Temporary Workarounds
Disable Theme Management
allRemove or restrict access to the theme management functionality containing the vulnerable unInstallTheme function.
# Modify application code to disable theme management
# Remove or comment out theme management endpoints
File Permission Restrictions
linuxConfigure strict file permissions to limit what files the web application user can delete.
chmod 644 /path/to/critical/files
chown root:root /path/to/critical/files
🧯 If You Can't Patch
- Implement strict access controls to limit who can access theme management functions.
- Deploy web application firewall (WAF) rules to detect and block file deletion attempts.
🔍 How to Verify
Check if Vulnerable:
Check if running PerfreeBlog v4.0.11. Review application code for the unInstallTheme function in theme management modules.Check Version:
Check PerfreeBlog configuration files or admin panel for version information.Verify Fix Applied:
Test the unInstallTheme function with controlled inputs to ensure it no longer allows arbitrary file deletion.📡 Detection & Monitoring
Log Indicators:
- Unusual file deletion events in web server logs
- Multiple failed theme management attempts
- Access to theme management endpoints from unusual IPs
Network Indicators:
- HTTP POST requests to theme management endpoints with file path parameters
- Unusual patterns in theme-related API calls
SIEM Query:
source="web_server" AND (uri="/admin/theme" OR uri CONTAINS "uninstall") AND status=200