CVE-2025-1835
📋 TL;DR
CVE-2025-1835 is a critical unrestricted file upload vulnerability in osuuu LightPicture 1.2.2 that allows remote attackers to upload arbitrary files to the server. This affects all systems running the vulnerable version of LightPicture, potentially leading to complete system compromise.
💻 Affected Systems
- osuuu LightPicture
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to full server compromise, data theft, and lateral movement within the network.
Likely Case
Webshell deployment allowing persistent access, file system manipulation, and potential data exfiltration.
If Mitigated
Limited impact with proper file upload restrictions and web application firewalls in place.
🎯 Exploit Status
Exploit details are publicly available on GitHub. Attack requires only HTTP access to the vulnerable endpoint.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available
Restart Required: No
Instructions:
No official patch available. Consider upgrading to a newer version if available or implementing workarounds.
🔧 Temporary Workarounds
Implement File Upload Restrictions
allAdd server-side validation for file uploads including file type checking, size limits, and content validation.
Web Application Firewall Rules
allConfigure WAF to block requests to /app/controller/Api.php with file upload parameters.
🧯 If You Can't Patch
- Disable the vulnerable upload endpoint completely if not required
- Implement strict network segmentation and isolate the vulnerable system
🔍 How to Verify
Check if Vulnerable:
Check if LightPicture version is 1.2.2 and test file upload to /app/controller/Api.php endpoint.Check Version:
Check application configuration files or admin panel for version informationVerify Fix Applied:
Test file upload with various file types to verify restrictions are properly implemented.📡 Detection & Monitoring
Log Indicators:
- Unusual file uploads to /app/controller/Api.php
- Large number of POST requests to upload endpoint
- Uploads of executable file types
Network Indicators:
- HTTP POST requests to /app/controller/Api.php with file parameters
- Unusual outbound connections from web server
SIEM Query:
source="web_logs" AND uri="/app/controller/Api.php" AND method="POST" AND size>1000000