CVE-2025-12257: Online Student Result System SQLi Flaw

CVE-2025-12257 Overview

A SQL injection vulnerability has been identified in SourceCodester Online Student Result System version 1.0. This security flaw affects the processing of the /view_result.php file, where improper handling of the ID parameter allows attackers to inject malicious SQL queries. The vulnerability can be exploited remotely without authentication, potentially allowing unauthorized access to sensitive student data stored in the application's database.

Critical Impact

Remote attackers can exploit this SQL injection vulnerability to extract, modify, or delete sensitive student records and grades from the database without authentication.

Affected Products

• SourceCodester Online Student Result System 1.0
• oretnom23 online_student_result_system

Discovery Timeline

• October 27, 2025 - CVE-2025-12257 published to NVD
• October 28, 2025 - Last updated in NVD database

Technical Details for CVE-2025-12257

Vulnerability Analysis

This SQL injection vulnerability (CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component) exists in the /view_result.php endpoint of the Online Student Result System. The application fails to properly sanitize user-supplied input in the ID parameter before incorporating it into SQL queries. This architectural weakness allows attackers to manipulate database queries by injecting malicious SQL syntax through the vulnerable parameter.

The vulnerability is remotely exploitable with low attack complexity. No authentication or user interaction is required for exploitation, making this flaw particularly dangerous for publicly accessible instances of the application. The exploit has been publicly disclosed, increasing the risk of widespread exploitation.

Root Cause

The root cause of this vulnerability is insufficient input validation and the absence of parameterized queries (prepared statements) in the /view_result.php file. When user-supplied data from the ID parameter is directly concatenated into SQL queries without proper sanitization or escaping, the application becomes susceptible to SQL injection attacks. This represents a fundamental secure coding violation where untrusted input is treated as trusted data within database operations.

Attack Vector

The attack vector is network-based, allowing remote exploitation. An attacker can craft malicious HTTP requests to the /view_result.php endpoint with specially crafted values in the ID parameter. By injecting SQL metacharacters and statements, the attacker can manipulate the underlying database query logic to perform unauthorized operations.

Typical exploitation scenarios include:

• Data extraction: Using UNION-based or blind SQL injection techniques to extract sensitive student records, grades, and personal information
• Authentication bypass: Manipulating queries to bypass access controls and view unauthorized results
• Data manipulation: Modifying or deleting student records and grades
• Database enumeration: Discovering database structure, table names, and column information

The vulnerability affects the confidentiality, integrity, and availability of the application's data, though each impact is limited in scope according to the CVSS assessment.

Detection Methods for CVE-2025-12257

Indicators of Compromise

• Unusual or malformed requests to /view_result.php containing SQL syntax characters such as single quotes ('), double dashes (--), or semicolons (;) in the ID parameter
• Database error messages appearing in application logs or responses indicating SQL syntax errors
• Unexpected database queries containing UNION SELECT, OR 1=1, or other SQL injection patterns
• Evidence of bulk data extraction or anomalous database read patterns

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block SQL injection patterns in request parameters targeting /view_result.php
• Configure database activity monitoring to alert on suspicious query patterns including UNION-based queries, time-based blind injection attempts, and error-based extraction techniques
• Deploy Intrusion Detection System (IDS) signatures for common SQL injection payloads
• Enable detailed application logging for the /view_result.php endpoint to capture all requests and parameter values

Monitoring Recommendations

• Monitor web server access logs for requests to /view_result.php with encoded or suspicious ID parameter values
• Set up alerts for database errors that may indicate failed injection attempts
• Track unusual spikes in database query volume or response times that could indicate data exfiltration
• Review authentication logs for any unauthorized access patterns following potential exploitation

How to Mitigate CVE-2025-12257

Immediate Actions Required

• Restrict access to the Online Student Result System to trusted networks or implement additional authentication layers
• Deploy a Web Application Firewall (WAF) configured with SQL injection protection rules
• Consider taking the application offline until a patch is available if it contains highly sensitive data
• Review database access logs for evidence of prior exploitation

Patch Information

As of the last update on October 28, 2025, no official vendor patch has been released for this vulnerability. The application is developed by oretnom23 and distributed through SourceCodester. Organizations should monitor the SourceCodester website for security updates. Additional technical details are available in the GitHub CVE Issue Discussion and VulDB entry #329928.

Workarounds

• Implement parameterized queries (prepared statements) in the /view_result.php file to properly separate SQL code from user input
• Add server-side input validation to restrict the ID parameter to expected formats (e.g., numeric values only)
• Deploy a reverse proxy or WAF with SQL injection filtering capabilities in front of the application
• Apply the principle of least privilege to the database user account used by the application to minimize potential damage from successful exploitation

# Configuration example - Apache ModSecurity WAF rule for SQL injection protection
# Add to modsecurity.conf or rules file
SecRule ARGS:ID "@detectSQLi" \
    "id:1001,\
    phase:2,\
    deny,\
    status:403,\
    log,\
    msg:'SQL Injection attempt detected in ID parameter',\
    logdata:'Matched Data: %{MATCHED_VAR} found within %{MATCHED_VAR_NAME}'"