CVE-2026-5182: Teacher Record System 1.0 SQLi Vulnerability

CVE-2026-5182 Overview

A SQL injection vulnerability has been identified in SourceCodester Teacher Record System version 1.0. The vulnerability exists in the Parameter Handler component, specifically within the searchteacher parameter. An attacker can manipulate this argument to inject malicious SQL queries, potentially compromising the integrity and confidentiality of the database. The attack can be initiated remotely without authentication, and exploit details have been publicly disclosed.

Critical Impact

This SQL injection vulnerability allows remote attackers to manipulate database queries through the searchteacher parameter, potentially leading to unauthorized data access, data modification, or extraction of sensitive teacher records from the application database.

Affected Products

• SourceCodester Teacher Record System 1.0
• Teacher Record System Parameter Handler Component
• Teacher Record System Search Functionality

Discovery Timeline

• 2026-03-31 - CVE-2026-5182 published to NVD
• 2026-04-01 - Last updated in NVD database

Technical Details for CVE-2026-5182

Vulnerability Analysis

This vulnerability is classified under CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component), commonly known as injection. The Teacher Record System fails to properly sanitize user input provided through the searchteacher parameter before incorporating it into SQL queries. This oversight allows attackers to inject arbitrary SQL commands that the database server will execute.

The vulnerability is particularly concerning because it can be exploited remotely without requiring any authentication or user interaction. The application's search functionality directly incorporates user-supplied data into database queries without proper parameterization or input validation, creating a classic SQL injection attack surface.

Root Cause

The root cause of this vulnerability stems from improper input validation and the use of unsanitized user input in SQL query construction. The searchteacher parameter accepts arbitrary input from users and concatenates it directly into SQL statements rather than using prepared statements or parameterized queries. This fundamental flaw allows special SQL characters and commands to be interpreted as part of the query structure rather than as data.

Attack Vector

The attack can be executed remotely over the network. An attacker targeting this vulnerability would craft a malicious HTTP request containing SQL injection payloads in the searchteacher parameter. The Parameter Handler component processes this input without adequate sanitization, passing the malicious SQL syntax directly to the database engine.

Typical attack scenarios include:

• Data Exfiltration: Using UNION-based injection to retrieve sensitive data from other database tables
• Authentication Bypass: Manipulating login queries to gain unauthorized access
• Data Manipulation: Inserting, updating, or deleting records in the database
• Information Gathering: Enumerating database structure, table names, and column information

The vulnerability has been publicly documented, with technical details available in the GitHub Issue Discussion and VulDB entry. Security teams should review these resources for additional exploitation details.

Detection Methods for CVE-2026-5182

Indicators of Compromise

• Unusual SQL syntax patterns in web server access logs targeting the searchteacher parameter
• Database error messages appearing in application responses indicating malformed queries
• Unexpected database queries containing UNION SELECT, OR 1=1, or other common SQL injection patterns
• Anomalous database activity such as bulk data reads or unauthorized table access

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect SQL injection patterns in the searchteacher parameter
• Monitor application logs for requests containing SQL metacharacters such as single quotes, double dashes, or semicolons
• Deploy database activity monitoring to identify queries with injection patterns or unusual data access patterns
• Use intrusion detection systems (IDS) with signatures for common SQL injection attack strings

Monitoring Recommendations

• Enable detailed logging for all requests to the Teacher Record System search functionality
• Configure alerting for database errors that may indicate SQL injection attempts
• Monitor for unusual outbound data transfers that could indicate successful data exfiltration
• Implement query logging on the database server to track anomalous SQL statement execution

How to Mitigate CVE-2026-5182

Immediate Actions Required

• Restrict access to the Teacher Record System search functionality until a patch is applied
• Implement input validation on the searchteacher parameter to block SQL metacharacters
• Deploy Web Application Firewall rules to filter malicious requests targeting the vulnerable parameter
• Review database access logs for evidence of prior exploitation attempts

Patch Information

At the time of publication, no official vendor patch has been released for this vulnerability. Organizations using SourceCodester Teacher Record System 1.0 should contact the vendor through SourceCodester for security updates. Additional vulnerability details and community discussion can be found in the VulDB submission.

Workarounds

• Implement prepared statements or parameterized queries if modifying the source code is possible
• Deploy a reverse proxy or WAF with SQL injection filtering rules in front of the application
• Restrict network access to the application to trusted IP addresses only
• Consider disabling the search functionality entirely until a proper fix is available
• Apply principle of least privilege to database accounts used by the application to limit potential damage

# Example WAF rule for ModSecurity to block SQL injection in searchteacher parameter
SecRule ARGS:searchteacher "@detectSQLi" \
    "id:100001,\
    phase:2,\
    deny,\
    status:403,\
    log,\
    msg:'SQL Injection attempt detected in searchteacher parameter - CVE-2026-5182'"