CVE-2026-5583: PHPGurukul Shopping Portal SQLi Flaw

CVE-2026-5583 Overview

A SQL injection vulnerability has been identified in PHPGurukul Online Shopping Portal Project version 2.1. This security flaw affects the /my-profile.php file within the Parameter Handler component. By manipulating the fullname argument, an attacker can inject malicious SQL commands into the application. The vulnerability is remotely exploitable, and proof-of-concept exploit code has been publicly disclosed.

Critical Impact

Remote attackers with low-level authentication can exploit this SQL injection vulnerability to manipulate database queries, potentially leading to unauthorized data access, data modification, or data deletion within the Online Shopping Portal's database.

Affected Products

• PHPGurukul Online Shopping Portal Project 2.1

Discovery Timeline

• 2026-04-05 - CVE CVE-2026-5583 published to NVD
• 2026-04-07 - Last updated in NVD database

Technical Details for CVE-2026-5583

Vulnerability Analysis

This SQL injection vulnerability exists in the user profile management functionality of the PHPGurukul Online Shopping Portal. The fullname parameter in /my-profile.php does not properly sanitize user input before incorporating it into SQL queries. This allows authenticated users to inject arbitrary SQL syntax through the profile editing form.

The vulnerability is classified under CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component), indicating that user-controlled input is not properly escaped or validated before being used in SQL statements. An attacker with valid user credentials can manipulate their profile data to execute unauthorized database operations, potentially accessing sensitive customer information, modifying orders, or escalating privileges within the application.

Root Cause

The root cause of this vulnerability is insufficient input validation and the lack of parameterized queries (prepared statements) in the /my-profile.php script. When processing the fullname parameter, the application directly concatenates user input into SQL query strings without proper sanitization or escaping. This allows special SQL characters and commands to be interpreted as part of the query structure rather than as data values.

Attack Vector

The attack is conducted remotely over the network. An attacker must first authenticate to the Online Shopping Portal with at least low-level privileges (e.g., a regular user account). Once authenticated, the attacker accesses the profile page and submits a specially crafted payload in the fullname field. The malicious input is processed by the Parameter Handler and executed against the backend database, allowing the attacker to extract data, modify records, or perform other unauthorized database operations.

The vulnerability in the fullname parameter of /my-profile.php allows SQL injection through user-supplied input. When the application constructs database queries using unsanitized input from profile form fields, an attacker can inject SQL metacharacters (such as single quotes, semicolons, or UNION operators) to alter query logic. This enables unauthorized reading of database contents, modification of data, or potentially gaining administrative access. For detailed technical analysis and proof-of-concept information, refer to the VulDB vulnerability entry.

Detection Methods for CVE-2026-5583

Indicators of Compromise

• Unusual SQL syntax or special characters appearing in web application logs, particularly in requests to /my-profile.php
• Database error messages in application logs indicating malformed queries from the fullname parameter
• Unexpected changes to user profile data, especially in the fullname field containing suspicious characters
• Database query logs showing UNION-based SELECT statements or time-based queries from the profile update functionality

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect SQL injection patterns in POST parameters targeting /my-profile.php
• Implement database activity monitoring to identify anomalous queries originating from the profile management module
• Configure application logging to capture and alert on SQL syntax errors and injection attempts
• Use intrusion detection systems with signatures for common SQL injection payloads in HTTP POST data

Monitoring Recommendations

• Monitor HTTP POST requests to /my-profile.php for suspicious characters in the fullname parameter including single quotes, double dashes, and SQL keywords
• Enable detailed database logging to track queries executed through the profile management component
• Set up alerting for multiple failed SQL queries or database errors from a single user session

How to Mitigate CVE-2026-5583

Immediate Actions Required

• Review and audit all user input handling in /my-profile.php and related profile management files
• Implement input validation to restrict the fullname parameter to alphanumeric characters and safe symbols
• Deploy Web Application Firewall rules to block known SQL injection patterns targeting profile endpoints
• Consider temporarily disabling the profile editing functionality until a patch is applied

Patch Information

No official vendor patch information is currently available. Users should monitor the PHPGurukul website for security updates and patches. The vulnerability has been documented in VulDB entry #355380 and discussed in the GitHub CVE issue tracker for additional technical details.

Workarounds

• Replace direct SQL query construction with parameterized queries (prepared statements) using PDO or MySQLi
• Implement strict input validation using allowlist patterns for the fullname field (e.g., letters, spaces, hyphens only)
• Apply the principle of least privilege to the database user account used by the application
• Deploy a Web Application Firewall with SQL injection protection rules enabled

# Example: Restrict access to profile functionality via .htaccess
# Place in the directory containing my-profile.php

# Temporarily disable access to vulnerable profile page
<Files "my-profile.php">
    Order Deny,Allow
    Deny from all
    # Allow only from trusted admin IPs
    Allow from 192.168.1.0/24
</Files>