CVE-2025-4736
📋 TL;DR
This critical SQL injection vulnerability in PHPGurukul Daily Expense Tracker 1.1 allows attackers to manipulate database queries through the email parameter in /register.php. Remote attackers can potentially access, modify, or delete sensitive data. All users running version 1.1 are affected.
💻 Affected Systems
- PHPGurukul Daily Expense Tracker
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise including credential theft, data destruction, and potential remote code execution if database permissions allow.
Likely Case
Unauthorized data access and extraction of sensitive information like user credentials, financial records, and personal data.
If Mitigated
Limited impact with proper input validation and database permission restrictions in place.
🎯 Exploit Status
Exploit details are publicly disclosed on GitHub, making exploitation straightforward for attackers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://phpgurukul.com/
Restart Required: No
Instructions:
No official patch available. Consider implementing input validation and parameterized queries as workarounds.
🔧 Temporary Workarounds
Input Validation and Sanitization
allImplement strict input validation and sanitization for the email parameter in register.php
Edit register.php to add: $email = mysqli_real_escape_string($conn, $_POST['email']);
Web Application Firewall Rules
allDeploy WAF rules to block SQL injection patterns targeting /register.php
ModSecurity rule: SecRule ARGS:email "@detectSQLi" "id:1001,phase:2,deny,status:403"
🧯 If You Can't Patch
- Disable or restrict access to /register.php endpoint
- Implement network segmentation and isolate the application from sensitive databases
🔍 How to Verify
Check if Vulnerable:
Test the /register.php endpoint with SQL injection payloads in the email parameterCheck Version:
Check application version in configuration files or about pageVerify Fix Applied:
Verify that SQL injection attempts no longer succeed and proper input validation is implemented📡 Detection & Monitoring
Log Indicators:
- Unusual SQL error messages in application logs
- Multiple failed registration attempts with SQL patterns
Network Indicators:
- HTTP POST requests to /register.php containing SQL keywords in parameters
SIEM Query:
source="web_logs" AND uri_path="/register.php" AND (email="*' OR *" OR email="*;--*" OR email="*UNION*" OR email="*SELECT*" OR email="*INSERT*")