CVE-2025-13265
📋 TL;DR
This CVE describes a path traversal vulnerability in the lsfusion platform's unpackFile function that allows remote attackers to write files outside intended directories. It affects lsfusion platform installations up to version 6.1. Attackers can exploit this to potentially overwrite critical system files or deploy malicious payloads.
💻 Affected Systems
- lsfusion platform
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, data exfiltration, or ransomware deployment.
Likely Case
File system manipulation allowing attackers to overwrite configuration files, deploy web shells, or disrupt application functionality.
If Mitigated
Limited impact with proper file system permissions and input validation controls in place.
🎯 Exploit Status
Path traversal vulnerabilities are typically straightforward to exploit once the attack vector is identified.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version 6.2 or later
Vendor Advisory: https://github.com/lsfusion/platform/issues/1545
Restart Required: Yes
Instructions:
1. Upgrade lsfusion platform to version 6.2 or later. 2. Restart the application server. 3. Verify the fix by testing ZIP file upload functionality.
🔧 Temporary Workarounds
Input Validation Filter
allImplement server-side validation to reject ZIP files containing path traversal sequences
File System Sandboxing
linuxRun lsfusion with restricted file system permissions and in a chroot/jail environment
🧯 If You Can't Patch
- Implement network segmentation to restrict access to lsfusion servers
- Deploy web application firewall (WAF) rules to detect and block path traversal attempts
🔍 How to Verify
Check if Vulnerable:
Check lsfusion version - if version is 6.1 or earlier, system is vulnerable.Check Version:
Check application logs or configuration files for version informationVerify Fix Applied:
After upgrading to 6.2+, test ZIP file upload with path traversal payloads to confirm they are rejected.📡 Detection & Monitoring
Log Indicators:
- Failed file extraction attempts
- ZIP processing errors
- Unusual file write operations outside expected directories
Network Indicators:
- HTTP POST requests with ZIP files containing '../' sequences in filenames
SIEM Query:
source="lsfusion" AND ("unpackFile" OR "ZipUtils") AND ("error" OR "exception")