CVE-2026-5649: Online Admission System SQLi Vulnerability

CVE-2026-5649 Overview

A SQL injection vulnerability has been identified in code-projects Online Application System for Admission 1.0. This issue affects the processing of the file /enrollment/admsnform.php within the Endpoint component. Improper handling of user-supplied input allows attackers to inject malicious SQL statements, potentially compromising the integrity and confidentiality of the underlying database. The attack can be executed remotely, and the exploit has been publicly disclosed.

Critical Impact

Attackers can exploit this SQL injection flaw to extract sensitive admission data, modify database records, or potentially escalate access to the underlying server through database-level attacks.

Affected Products

• code-projects Online Application System for Admission 1.0
• /enrollment/admsnform.php Endpoint Component

Discovery Timeline

• 2026-04-06 - CVE-2026-5649 published to NVD
• 2026-04-07 - Last updated in NVD database

Technical Details for CVE-2026-5649

Vulnerability Analysis

This SQL injection vulnerability (CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component) occurs in the Online Application System for Admission's enrollment processing functionality. The vulnerable endpoint at /enrollment/admsnform.php fails to properly sanitize user-supplied input before incorporating it into SQL queries. This allows an authenticated attacker with low privileges to inject arbitrary SQL syntax through the detid parameter, manipulating the intended database queries.

The vulnerability is remotely exploitable over the network without requiring user interaction. While the proof-of-concept has been publicly disclosed, successful exploitation enables limited unauthorized access to database contents, modification of records, and potential disruption of database availability.

Root Cause

The root cause of this vulnerability is the lack of proper input validation and parameterized queries in the PHP application. The /enrollment/admsnform.php file directly concatenates user-supplied input (specifically the detid parameter) into SQL statements without sanitization or prepared statement usage. This classic injection pattern allows attackers to break out of the intended query structure and execute arbitrary SQL commands.

Attack Vector

The attack vector is network-based, requiring the attacker to send crafted HTTP requests to the vulnerable endpoint. The exploitation process involves:

1. Identifying the vulnerable parameter (detid) in the /enrollment/admsnform.php endpoint
2. Crafting malicious SQL payloads designed to manipulate the query logic
3. Submitting requests with injected SQL syntax to extract data, modify records, or enumerate database structure

The vulnerability can be exploited by any authenticated user with basic access to the enrollment system. Attackers may leverage techniques such as UNION-based injection, blind SQL injection, or time-based injection depending on the application's response behavior.

Technical details and proof-of-concept analysis are available at the GitHub SQL Injection Analysis repository.

Detection Methods for CVE-2026-5649

Indicators of Compromise

• Unusual SQL syntax patterns in web server access logs targeting /enrollment/admsnform.php
• Database query logs showing unexpected UNION SELECT, OR 1=1, or comment sequences (-- or #)
• Abnormal database read operations or data exfiltration attempts from admission-related tables
• Error messages in application logs indicating SQL syntax errors or database exceptions

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect SQL injection patterns in HTTP requests to the enrollment endpoint
• Implement application-level logging to capture all parameters submitted to /enrollment/admsnform.php
• Configure database audit logging to monitor for unusual query patterns or privilege escalation attempts
• Use intrusion detection systems (IDS) with signatures for common SQL injection payloads

Monitoring Recommendations

• Monitor web server logs for requests containing SQL metacharacters (', ", ;, --, UNION, SELECT) in URL parameters
• Set up alerts for database errors or exceptions originating from the affected application
• Track authentication patterns to identify potential account abuse for exploitation attempts
• Review database access logs for queries accessing sensitive admission records outside normal patterns

How to Mitigate CVE-2026-5649

Immediate Actions Required

• Restrict network access to the /enrollment/admsnform.php endpoint to trusted IP ranges or authenticated administrators only
• Implement Web Application Firewall rules to block SQL injection attack patterns
• Disable or remove the vulnerable Online Application System for Admission until a patch is available
• Review database user permissions to ensure the application uses least-privilege database accounts

Patch Information

No official vendor patch information is currently available for this vulnerability. The affected application is a code-projects educational project (version 1.0). Organizations using this software should monitor the Code Projects Resource Hub for updates. Additional vulnerability details are available at VulDB Vulnerability #355437.

Workarounds

• Implement input validation to sanitize the detid parameter, rejecting any input containing SQL metacharacters
• Refactor the vulnerable PHP code to use prepared statements with parameterized queries instead of string concatenation
• Deploy a reverse proxy or WAF with SQL injection filtering in front of the application
• Consider replacing the affected system with a more secure admission management solution

# Example WAF rule for ModSecurity to block SQL injection attempts
SecRule ARGS "@detectSQLi" \
    "id:1001,\
    phase:2,\
    deny,\
    status:403,\
    log,\
    msg:'SQL Injection Attempt Blocked - CVE-2026-5649',\
    logdata:'Matched Data: %{MATCHED_VAR}'"