CVE-2026-2199 Overview
A SQL Injection vulnerability has been discovered in Fabian Online Reviewer System 1.0. The vulnerability exists within the /reviewer/system/system/admins/manage/users/user-delete.php file, where improper handling of the ID parameter allows attackers to inject malicious SQL statements. This vulnerability can be exploited remotely without authentication, enabling attackers to manipulate database queries and potentially access, modify, or delete sensitive data.
Critical Impact
Remote attackers can exploit this SQL injection vulnerability to extract sensitive data from the database, bypass authentication mechanisms, or potentially compromise the underlying database server. The exploit has been publicly disclosed, increasing the risk of active exploitation.
Affected Products
- Fabian Online Reviewer System 1.0
Discovery Timeline
- 2026-02-09 - CVE CVE-2026-2199 published to NVD
- 2026-02-10 - Last updated in NVD database
Technical Details for CVE-2026-2199
Vulnerability Analysis
This SQL Injection vulnerability (CWE-89) occurs when user-supplied input to the ID parameter in the user-delete.php script is incorporated directly into SQL queries without proper sanitization or parameterization. The application fails to validate or escape special characters in the input, allowing attackers to inject arbitrary SQL commands that are then executed by the database engine.
The vulnerability is classified under both CWE-89 (SQL Injection) and CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component), indicating that the root issue stems from a fundamental failure to properly handle user input before using it in database operations.
Root Cause
The root cause of this vulnerability lies in the improper handling of user-controlled input within the user-delete.php file. The application directly concatenates the ID parameter value into SQL queries without implementing prepared statements, parameterized queries, or adequate input validation. This design flaw allows attackers to break out of the intended query structure and inject malicious SQL code.
Attack Vector
The attack can be initiated remotely over the network without requiring any authentication or user interaction. An attacker would craft a malicious HTTP request targeting the vulnerable endpoint at /reviewer/system/system/admins/manage/users/user-delete.php, manipulating the ID parameter to include SQL injection payloads.
Common exploitation techniques include:
- Union-based SQL injection to extract data from other database tables
- Boolean-based blind injection to enumerate database contents
- Time-based blind injection when direct output is not available
- Stacked queries (if supported by the database) to execute additional SQL statements
Technical details and proof-of-concept information have been documented in the GitHub CVE Issue Discussion and the VulDB advisory.
Detection Methods for CVE-2026-2199
Indicators of Compromise
- Unusual or malformed HTTP requests to /reviewer/system/system/admins/manage/users/user-delete.php containing SQL keywords such as UNION, SELECT, DROP, or --
- Database error messages appearing in web server logs or application responses
- Unexpected database query patterns or increased database load
- Evidence of data exfiltration or unauthorized database modifications
Detection Strategies
- Implement web application firewall (WAF) rules to detect and block SQL injection patterns targeting the vulnerable endpoint
- Monitor web server access logs for requests to user-delete.php containing suspicious characters or SQL syntax
- Enable database query logging and alert on queries with injection signatures or anomalous patterns
- Deploy intrusion detection systems (IDS) with signatures for SQL injection attempts
Monitoring Recommendations
- Enable detailed logging on the web server to capture full request parameters for the affected endpoint
- Configure database auditing to track all queries executed against user tables
- Set up alerts for failed database queries that may indicate injection attempts
- Monitor for unusual outbound data transfers that could indicate successful data exfiltration
How to Mitigate CVE-2026-2199
Immediate Actions Required
- Restrict network access to the Online Reviewer System administrative interface to trusted IP addresses only
- Implement a web application firewall with SQL injection protection rules as a temporary measure
- Consider disabling the affected user-delete.php functionality until a patch is available
- Review and audit database access logs for any signs of prior exploitation
Patch Information
No official vendor patch information is currently available for this vulnerability. Organizations using Fabian Online Reviewer System 1.0 should monitor the Code Projects Resource Hub for updates. Additional technical details can be found in the VulDB advisory and the GitHub CVE Issue Discussion.
Workarounds
- Implement input validation on the ID parameter to accept only numeric values
- Deploy a reverse proxy or WAF to filter malicious SQL injection payloads before they reach the application
- Apply the principle of least privilege to the database user account used by the application, limiting permissions to only what is necessary
- Consider implementing prepared statements or parameterized queries if modifying the source code is feasible
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
