CVE-2025-51092
📋 TL;DR
This SQL injection vulnerability in the LogIn-SignUp PHP project allows attackers to execute arbitrary SQL commands by manipulating login or registration inputs. Any system using this vulnerable code is affected, potentially compromising database integrity and confidentiality. The vulnerability stems from unsafe query construction that directly concatenates user input without proper sanitization.
💻 Affected Systems
- LogIn-SignUp PHP project by VishnuSivadasVS
📦 What is this software?
Login Signup by Vishnusivadas
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise including data theft, modification, deletion, or potential remote code execution via database functions.
Likely Case
Authentication bypass allowing unauthorized access, data exfiltration of user credentials and personal information, and database manipulation.
If Mitigated
Limited impact with proper input validation and prepared statements preventing SQL injection while maintaining functionality.
🎯 Exploit Status
SQL injection is well-understood with many automated tools available; the vulnerability is in authentication endpoints making it attractive to attackers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available
Restart Required: No
Instructions:
1. Replace direct string concatenation in DataBase.php with prepared statements using parameterized queries. 2. Validate and sanitize all user inputs including table names. 3. Use proper escaping functions for any dynamic table/column names. 4. Implement proper input validation in prepareData() function.
🔧 Temporary Workarounds
Input Validation Wrapper
allAdd strict input validation before passing to database functions
Implement regex validation for username/email fields
Add length limits on all input parameters
Use PHP filter_var() for email validation
Database Permission Reduction
allLimit database user permissions to minimum required
REVOKE ALL PRIVILEGES ON database.* FROM 'app_user'@'localhost';
GRANT SELECT, INSERT, UPDATE ON database.users TO 'app_user'@'localhost';
🧯 If You Can't Patch
- Implement web application firewall (WAF) with SQL injection rules
- Isolate database server and restrict network access to application server only
🔍 How to Verify
Check if Vulnerable:
Test login form with SQL injection payloads like ' OR '1'='1 in username/password fields and observe if authentication bypass occurs.Check Version:
Check DataBase.php file for use of prepared statements instead of string concatenation in logIn() and signUp() functions.Verify Fix Applied:
Attempt SQL injection attacks after fix implementation; successful attacks should be blocked and proper error handling should be in place.📡 Detection & Monitoring
Log Indicators:
- Unusual SQL syntax errors in application logs
- Multiple failed login attempts with SQL-like patterns
- Database queries containing unusual characters like quotes, semicolons, or comments
Network Indicators:
- HTTP requests with SQL keywords in POST parameters
- Unusual database connection patterns from application server
SIEM Query:
source="web_logs" AND (url="*/login*" OR url="*/signup*") AND (request_body LIKE "%' OR '%" OR request_body LIKE "%'--%" OR request_body LIKE "%'/*%" OR request_body LIKE "%' UNION %")