CVE-2023-1722
📋 TL;DR
Yoga Class Registration System 1.0 contains a cross-site request forgery (CSRF) vulnerability that allows administrators to execute arbitrary commands on the server. The vulnerability exists because the application fails to properly validate class thumbnail uploads. This affects any organization using the vulnerable version of this PHP/MySQL web application.
💻 Affected Systems
- Yoga Class Registration System
📦 What is this software?
Yoga Class Registration System by Yoga Class Registration System Project
⚠️ Risk & Real-World Impact
Worst Case
Full server compromise allowing attackers to execute arbitrary commands, access sensitive data, install malware, or pivot to other systems in the network.
Likely Case
Unauthorized command execution leading to data theft, website defacement, or installation of backdoors for persistent access.
If Mitigated
Limited impact if proper input validation and CSRF protections are implemented, restricting the attack surface.
🎯 Exploit Status
Exploitation requires tricking an administrator into performing a malicious action via CSRF, but the technical execution is straightforward once the administrator is compromised.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch exists. Consider replacing the application with a secure alternative or implementing the workarounds below.
🔧 Temporary Workarounds
Implement CSRF Protection
allAdd CSRF tokens to all forms and validate them on the server side.
Add CSRF token generation and validation in PHP code
Implement File Upload Validation
allAdd strict validation for uploaded files including file type checking, size limits, and content validation.
Implement file validation in PHP upload handling code
🧯 If You Can't Patch
- Restrict administrator access to trusted networks only
- Implement web application firewall (WAF) rules to block suspicious upload patterns
🔍 How to Verify
Check if Vulnerable:
Check if running Yoga Class Registration System version 1.0 and review code for missing CSRF protection and file upload validation.Check Version:
Check application files for version information or review source code commentsVerify Fix Applied:
Test that CSRF tokens are required for all form submissions and that file uploads are properly validated.📡 Detection & Monitoring
Log Indicators:
- Unusual file uploads to class thumbnail endpoints
- Suspicious POST requests without CSRF tokens
- Unexpected command execution in server logs
Network Indicators:
- HTTP requests to upload endpoints with unusual file types
- Traffic patterns suggesting CSRF attacks
SIEM Query:
source="web_server" AND (uri="*upload*" OR uri="*thumbnail*") AND (file_extension!="jpg" AND file_extension!="png" AND file_extension!="gif")🔗 References
- https://fluidattacks.com/advisories/wyckoff/
- https://www.sourcecodester.com/php/16097/yoga-class-registration-system-php-and-mysql-free-source-code.html
- https://fluidattacks.com/advisories/wyckoff/
- https://www.sourcecodester.com/php/16097/yoga-class-registration-system-php-and-mysql-free-source-code.html
