CVE-2025-63622: Online Complaint Site SQLi Vulnerability

CVE-2025-63622 Overview

A SQL injection vulnerability has been identified in Fabian Online Complaint Site version 1.0. This issue affects the processing of the file /cms/admin/subcategory.php, where manipulation of the category argument enables SQL injection attacks. Attackers can exploit this vulnerability remotely without authentication to compromise database confidentiality, integrity, and availability.

Critical Impact

Unauthenticated attackers can execute arbitrary SQL commands against the database, potentially leading to complete data exfiltration, data manipulation, or full system compromise.

Affected Products

• Fabian Online Complaint Site version 1.0

Discovery Timeline

• 2025-10-29 - CVE-2025-63622 published to NVD
• 2025-11-03 - Last updated in NVD database

Technical Details for CVE-2025-63622

Vulnerability Analysis

This SQL injection vulnerability exists in the administrative subcategory management functionality of the Online Complaint Site application. The category parameter in /cms/admin/subcategory.php is not properly sanitized before being incorporated into SQL queries, allowing attackers to inject malicious SQL statements.

The vulnerability is exploitable over the network without requiring any authentication or user interaction. This makes it particularly dangerous as attackers can remotely access and manipulate the underlying database. The weakness is classified under CWE-89 (Improper Neutralization of Special Elements used in an SQL Command), which represents a fundamental input validation failure.

Root Cause

The root cause of this vulnerability is improper input validation and lack of parameterized queries in the /cms/admin/subcategory.php file. The category parameter value is directly concatenated or interpolated into SQL query strings without proper sanitization or use of prepared statements. This allows special SQL characters and commands to be interpreted as part of the query structure rather than as data.

Attack Vector

The attack vector is network-based, allowing remote exploitation. An attacker can craft malicious HTTP requests to the vulnerable endpoint /cms/admin/subcategory.php with a manipulated category parameter containing SQL injection payloads. Common attack techniques include:

• Union-based injection - Extracting data from other database tables
• Boolean-based blind injection - Inferring database contents through conditional responses
• Time-based blind injection - Using database sleep functions to exfiltrate data
• Stacked queries - Executing multiple SQL statements including data modification or deletion

The vulnerability allows attackers to bypass authentication, access sensitive data, modify or delete database records, and potentially achieve command execution on the underlying server depending on database configuration.

For technical details and proof of concept information, refer to the GitHub CVE Issue Discussion.

Detection Methods for CVE-2025-63622

Indicators of Compromise

• HTTP requests to /cms/admin/subcategory.php containing SQL syntax characters such as single quotes, double dashes, semicolons, or UNION keywords in the category parameter
• Unusual database query patterns or errors in application logs indicating attempted SQL injection
• Unexpected database access patterns or queries accessing multiple tables in succession
• Web server access logs showing requests with URL-encoded SQL payloads targeting the subcategory endpoint

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect and block SQL injection patterns in requests to /cms/admin/subcategory.php
• Implement database activity monitoring to detect anomalous query patterns such as UNION SELECT, information_schema access, or time-based injection attempts
• Configure application-level logging to capture and alert on malformed or suspicious parameter values
• Use intrusion detection systems (IDS) with signatures for common SQL injection attack patterns

Monitoring Recommendations

• Monitor web server access logs for requests containing SQL metacharacters targeting the vulnerable endpoint
• Enable database query logging and analyze for injection patterns or unauthorized data access attempts
• Set up alerts for failed database queries that may indicate injection attempts
• Review authentication logs for any suspicious successful logins that may result from authentication bypass

How to Mitigate CVE-2025-63622

Immediate Actions Required

• Restrict access to the /cms/admin/subcategory.php endpoint through network-level controls or authentication requirements
• Implement a Web Application Firewall with SQL injection protection rules as a temporary measure
• If possible, take the vulnerable application offline until a patch is available or mitigations are in place
• Audit database access logs for evidence of prior exploitation

Patch Information

No official patch or vendor advisory has been published for this vulnerability at the time of writing. Organizations using Fabian Online Complaint Site 1.0 should contact the vendor for remediation guidance or implement the workarounds described below. Monitor the GitHub CVE Issue Discussion for updates.

Workarounds

• Implement input validation to sanitize the category parameter and reject requests containing SQL metacharacters
• Modify the application code to use parameterized queries or prepared statements instead of string concatenation for database queries
• Deploy a reverse proxy or WAF with SQL injection detection capabilities in front of the application
• Restrict network access to the administrative functionality to trusted IP addresses only

# Example WAF rule for ModSecurity to block SQL injection attempts
SecRule ARGS:category "@detectSQLi" \
    "id:100001,phase:2,deny,status:403,log,msg:'SQL Injection attempt blocked in category parameter'"