CVE-2025-1355
📋 TL;DR
This critical vulnerability in needyamin Library Card System 1.0 allows attackers to upload arbitrary files to the /signup.php endpoint, potentially leading to remote code execution. The vulnerability affects all systems running this software with the vulnerable component enabled. Attackers can exploit this remotely without authentication.
💻 Affected Systems
- needyamin Library Card System
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise via web shell upload leading to data theft, ransomware deployment, or use as attack platform
Likely Case
Web shell installation allowing persistent backdoor access and data exfiltration
If Mitigated
File upload attempts blocked or quarantined with no successful exploitation
🎯 Exploit Status
Exploit code publicly available, simple file upload bypass technique
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch available. Vendor unresponsive. Consider alternative software or implement workarounds.
🔧 Temporary Workarounds
Web Application Firewall Rule
allBlock file uploads to /signup.php or restrict to specific file types
WAF specific - configure rule to block POST requests to /signup.php with file upload content
File Upload Validation
Linux/UnixImplement server-side file type validation and restrict upload directory permissions
Modify signup.php to validate file extensions and MIME types
chmod 755 upload_directory/
chown www-data:www-data upload_directory/
🧯 If You Can't Patch
- Disable the Add Picture functionality completely
- Implement network segmentation to isolate the vulnerable system
🔍 How to Verify
Check if Vulnerable:
Attempt to upload a test file (e.g., test.php) to /signup.php and check if it's saved with executable permissionsCheck Version:
Check software version in admin panel or readme filesVerify Fix Applied:
Test file upload with various extensions - only allowed types should be accepted📡 Detection & Monitoring
Log Indicators:
- Multiple failed/successful file uploads to /signup.php
- Unusual file types (.php, .jsp, .asp) in upload directory
Network Indicators:
- POST requests to /signup.php with file upload content
- Unusual outbound connections from web server
SIEM Query:
source="web_logs" AND uri="/signup.php" AND method="POST" AND (content_type="multipart/form-data" OR user_agent contains "curl" OR user_agent contains "wget")