CVE-2025-60729
📋 TL;DR
PerfreeBlog v4.0.11 contains an arbitrary file read vulnerability in the validThemeFilePath function that allows attackers to read sensitive files on the server. This affects all users running the vulnerable version of PerfreeBlog blogging software. The vulnerability could expose configuration files, credentials, or other sensitive data.
💻 Affected Systems
- PerfreeBlog
📦 What is this software?
Perfreeblog by Perfree
⚠️ Risk & Real-World Impact
Worst Case
Attackers could read sensitive server files including configuration files, database credentials, SSH keys, or other authentication tokens, potentially leading to full system compromise.
Likely Case
Attackers read configuration files containing database credentials or other sensitive information, enabling further attacks against the application or database.
If Mitigated
With proper file permissions and web server restrictions, impact is limited to readable files within the web application context.
🎯 Exploit Status
Exploitation requires understanding of the validThemeFilePath function and ability to craft malicious requests.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version after v4.0.11
Vendor Advisory: https://perfree.org.cn/
Restart Required: No
Instructions:
1. Upgrade PerfreeBlog to the latest version. 2. Check the official website or GitHub repository for security updates. 3. Replace vulnerable files with patched versions.
🔧 Temporary Workarounds
Restrict file access via web server
allConfigure web server to restrict access to sensitive directories and files
# Apache: Use .htaccess to restrict access
# Nginx: Use location blocks to restrict sensitive paths
Implement input validation
allAdd validation to the validThemeFilePath function to prevent directory traversal
# Validate theme file paths before processing
# Restrict to allowed theme directories only
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block directory traversal attempts
- Restrict file permissions on sensitive server files and directories
🔍 How to Verify
Check if Vulnerable:
Check if running PerfreeBlog v4.0.11 by examining version files or admin panelCheck Version:
Check PerfreeBlog configuration files or admin interface for version informationVerify Fix Applied:
Verify upgrade to version after v4.0.11 and test file read attempts📡 Detection & Monitoring
Log Indicators:
- Unusual file path requests in access logs
- Multiple failed attempts to access sensitive files
- Requests containing directory traversal patterns (../)
Network Indicators:
- HTTP requests with unusual file paths
- Multiple requests for non-existent theme files
SIEM Query:
web_access_logs WHERE url CONTAINS '../' OR url CONTAINS 'validThemeFilePath'