CVE-2026-5552: PHPGurukul Shopping Portal SQLi Flaw

CVE-2026-5552 Overview

A SQL injection vulnerability has been identified in PHPGurukul Online Shopping Portal Project 2.1. This security weakness affects the /sub-category.php file within the Parameter Handler component. Manipulation of the pid argument enables SQL injection attacks, allowing remote exploitation by attackers. The exploit has been publicly disclosed, increasing the risk of active exploitation attempts against vulnerable installations.

Critical Impact

Remote attackers can exploit this SQL injection vulnerability to manipulate database queries, potentially accessing, modifying, or deleting sensitive data including customer information, order details, and administrative credentials.

Affected Products

• PHPGurukul Online Shopping Portal Project 2.1
• /sub-category.php Parameter Handler component

Discovery Timeline

• 2026-04-05 - CVE CVE-2026-5552 published to NVD
• 2026-04-07 - Last updated in NVD database

Technical Details for CVE-2026-5552

Vulnerability Analysis

This vulnerability stems from improper input validation in the /sub-category.php file of PHPGurukul Online Shopping Portal Project 2.1. The pid parameter is passed directly to SQL queries without adequate sanitization or parameterization, enabling attackers to inject malicious SQL statements. The network-accessible nature of this vulnerability allows remote attackers with low privileges to exploit it without user interaction. Successful exploitation can compromise data confidentiality, integrity, and availability of the underlying database.

Root Cause

The root cause of CVE-2026-5552 is classified under CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component - Injection). The application fails to properly sanitize user-supplied input in the pid parameter before incorporating it into SQL queries. This allows attackers to break out of the intended query structure and inject arbitrary SQL commands that the database server executes with the application's privileges.

Attack Vector

The attack vector is network-based, requiring no physical access to the target system. An attacker can exploit this vulnerability by sending specially crafted HTTP requests to the /sub-category.php endpoint with a malicious pid parameter value. The injected SQL payload is then processed by the database, potentially allowing the attacker to:

• Extract sensitive data from the database (customer records, credentials)
• Modify or delete existing database records
• Bypass authentication mechanisms
• Escalate privileges within the application

The vulnerability is remotely exploitable, and the public availability of exploit information increases the likelihood of attacks against unpatched systems. Technical details and proof-of-concept information can be found in the GitHub CVE Issue Discussion and the VulDB Vulnerability #355316.

Detection Methods for CVE-2026-5552

Indicators of Compromise

• Unusual database queries in application logs containing SQL syntax in the pid parameter
• Error messages revealing database structure or SQL syntax errors in HTTP responses
• Unexpected database modifications or data exfiltration activities
• Web server logs showing requests to /sub-category.php with encoded or suspicious pid values

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect SQL injection patterns in request parameters
• Monitor application logs for SQL error messages and failed query attempts
• Implement database activity monitoring to detect anomalous query patterns
• Use intrusion detection systems (IDS) with signatures for SQL injection attempts targeting PHP applications

Monitoring Recommendations

• Enable detailed logging for the /sub-category.php endpoint and review logs regularly
• Configure alerts for database queries that contain SQL keywords in user-supplied parameters
• Monitor for high volumes of requests to the vulnerable endpoint from single IP addresses
• Implement real-time monitoring of database query execution times and patterns

How to Mitigate CVE-2026-5552

Immediate Actions Required

• Restrict access to the /sub-category.php endpoint using network segmentation or firewall rules
• Implement input validation to ensure the pid parameter contains only expected numeric values
• Deploy a Web Application Firewall with SQL injection protection rules
• Review access logs for evidence of exploitation attempts and investigate suspicious activity

Patch Information

At the time of this writing, users should check the PHP Gurukul Security Resources for updated versions of the Online Shopping Portal Project that address this vulnerability. Organizations should prioritize updating to a patched version as soon as one becomes available. Additional technical context is available through the VulDB Submission #782864.

Workarounds

• Use prepared statements with parameterized queries to prevent SQL injection
• Implement server-side input validation to reject non-numeric values in the pid parameter
• Deploy a WAF rule to block requests containing SQL injection patterns
• Consider taking the affected endpoint offline until a patch is applied in high-risk environments

# Example Apache .htaccess rule to block SQL injection patterns
<IfModule mod_rewrite.c>
    RewriteEngine On
    RewriteCond %{QUERY_STRING} (\%27)|(\')|(--)|(%23)|(#) [NC,OR]
    RewriteCond %{QUERY_STRING} (union)(.*)(select) [NC,OR]
    RewriteCond %{QUERY_STRING} (concat)(.*)\( [NC]
    RewriteRule ^sub-category\.php$ - [F,L]
</IfModule>