CVE-2026-2087: Janobe Class Record System SQLi Vulnerability

CVE-2026-2087 Overview

A SQL injection vulnerability has been discovered in SourceCodester Online Class Record System version 1.0. The flaw exists in the /admin/login.php file where the user_email parameter is improperly handled, allowing attackers to inject malicious SQL statements. This vulnerability can be exploited remotely without authentication, potentially enabling unauthorized database access, data manipulation, or information disclosure.

Critical Impact

Remote attackers can exploit this SQL injection vulnerability to bypass authentication, extract sensitive data, or manipulate database contents in the Online Class Record System.

Affected Products

• Janobe Online Class Record System 1.0

Discovery Timeline

• 2026-02-07 - CVE-2026-2087 published to NVD
• 2026-02-10 - Last updated in NVD database

Technical Details for CVE-2026-2087

Vulnerability Analysis

This SQL injection vulnerability (CWE-74: Injection) occurs in the administrative login functionality of the Online Class Record System. The application fails to properly sanitize user-supplied input in the user_email parameter before incorporating it into SQL queries. When a user submits login credentials through the /admin/login.php endpoint, the email address value is directly concatenated into database queries without adequate input validation or parameterized query usage.

The vulnerability allows remote attackers to manipulate the intended SQL query logic by injecting specially crafted payloads into the user_email field. This can lead to authentication bypass, unauthorized data extraction, or modification of database records containing sensitive student and class information.

Root Cause

The root cause of this vulnerability is improper input validation and the use of unsanitized user input in SQL query construction. The application directly incorporates the user_email parameter value into SQL statements without implementing prepared statements, parameterized queries, or adequate input sanitization mechanisms. This is a common vulnerability pattern in PHP applications that use string concatenation for database queries rather than secure query building methods.

Attack Vector

The attack is network-based and requires no authentication or user interaction. An attacker can exploit this vulnerability by submitting a specially crafted HTTP request to the /admin/login.php endpoint with a malicious payload in the user_email parameter. The attack can be performed remotely, making it accessible to any attacker who can reach the application over the network.

The exploitation method involves injecting SQL syntax into the email field that alters the query logic. Common techniques include using single quotes to break out of string contexts, boolean-based blind injection to extract data, or time-based techniques to infer database contents. For detailed technical information, refer to the GitHub CVE Issue Discussion and VulDB entry #344654.

Detection Methods for CVE-2026-2087

Indicators of Compromise

• HTTP requests to /admin/login.php containing SQL injection patterns such as single quotes, OR 1=1, UNION SELECT, or SQL comments in the user_email parameter
• Unusual database error messages in application logs indicating malformed SQL queries
• Unexpected successful admin logins from unknown IP addresses or without valid credentials
• Database query logs showing anomalous queries with injected SQL syntax

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect and block common SQL injection patterns in POST parameters targeting /admin/login.php
• Configure intrusion detection systems (IDS) to alert on SQL injection attack signatures in HTTP traffic
• Implement application-level logging to capture all authentication attempts with full parameter values for forensic analysis
• Use database activity monitoring to detect unusual query patterns or unauthorized data access

Monitoring Recommendations

• Monitor authentication logs for failed login attempts with suspicious user_email values containing special characters or SQL keywords
• Set up alerts for database errors related to SQL syntax issues originating from the login functionality
• Review web server access logs for repeated requests to /admin/login.php from single IP addresses indicating automated exploitation attempts
• Implement real-time monitoring for successful administrative logins from unexpected geographic locations

How to Mitigate CVE-2026-2087

Immediate Actions Required

• Restrict network access to the /admin/login.php endpoint using firewall rules or IP whitelisting until a patch is applied
• Deploy a Web Application Firewall (WAF) with SQL injection protection enabled for the affected endpoint
• Review database user permissions and apply the principle of least privilege to limit potential damage from SQL injection
• Consider temporarily disabling or restricting access to the administrative login functionality if feasible

Patch Information

As of the last modification date (2026-02-10), no official vendor patch has been released for this vulnerability. Organizations using the affected SourceCodester Online Class Record System 1.0 should monitor the SourceCodester website for security updates. Given that no vendor patch is currently available, implementing the workarounds below is strongly recommended to reduce exposure.

Workarounds

• Implement parameterized queries or prepared statements in the /admin/login.php file to prevent SQL injection by separating SQL code from user data
• Add server-side input validation to reject user_email values containing SQL injection characters or patterns
• Deploy network-level access controls to restrict administrative login access to trusted IP addresses only
• Consider using a reverse proxy with SQL injection filtering capabilities in front of the application

# Example Apache .htaccess configuration to restrict admin access by IP
<Files "login.php">
    <Directory "/admin">
        Order Deny,Allow
        Deny from all
        Allow from 192.168.1.0/24
        Allow from 10.0.0.0/8
    </Directory>
</Files>