CVE-2026-5675 Overview
A SQL injection vulnerability has been identified in itsourcecode Construction Management System 1.0. This vulnerability exists in the /borrowed_tool.php file within the Parameter Handler component. The flaw allows attackers to manipulate the emp argument to inject malicious SQL queries, potentially compromising the underlying database. The vulnerability can be exploited remotely by authenticated attackers, and exploit information has been publicly disclosed.
Critical Impact
Remote SQL injection allows attackers to read, modify, or delete database contents, potentially exposing sensitive construction project data, user credentials, and business information stored in the application database.
Affected Products
- itsourcecode Construction Management System 1.0
- Installations using the /borrowed_tool.php endpoint
- Systems with the vulnerable Parameter Handler component
Discovery Timeline
- 2026-04-06 - CVE CVE-2026-5675 published to NVD
- 2026-04-07 - Last updated in NVD database
Technical Details for CVE-2026-5675
Vulnerability Analysis
This SQL injection vulnerability (CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component) occurs in the /borrowed_tool.php file of the Construction Management System. The application fails to properly sanitize user-supplied input in the emp parameter before incorporating it into SQL queries. This allows an authenticated attacker with network access to inject arbitrary SQL commands that will be executed by the backend database server.
The vulnerability requires low privileges to exploit and does not require user interaction, making it relatively straightforward to abuse once an attacker has basic access to the application. Successful exploitation could lead to unauthorized data access, data manipulation, or in some configurations, command execution on the database server.
Root Cause
The root cause of this vulnerability is insufficient input validation and lack of parameterized queries in the Parameter Handler component. The emp argument is directly concatenated into SQL statements without proper sanitization or the use of prepared statements. This allows special SQL characters and syntax to be interpreted as executable SQL code rather than data.
Attack Vector
The attack can be executed remotely over the network. An attacker with low-level authentication to the Construction Management System can craft malicious HTTP requests to the /borrowed_tool.php endpoint. By injecting SQL syntax into the emp parameter, the attacker can manipulate database queries to extract sensitive information, bypass authentication checks, modify records, or potentially execute administrative operations on the database.
The exploitation technique involves sending specially crafted input through the emp parameter that breaks out of the intended SQL query structure and appends malicious SQL commands. Common attack payloads include UNION-based injection to extract data from other tables, boolean-based blind injection to enumerate database contents, and time-based blind injection when direct output is not visible.
Detection Methods for CVE-2026-5675
Indicators of Compromise
- Unusual SQL error messages in application or web server logs referencing /borrowed_tool.php
- HTTP requests to /borrowed_tool.php containing SQL keywords such as UNION, SELECT, DROP, or comment sequences (--, /*)
- Unexpected database queries or elevated database activity originating from the web application
- Evidence of data exfiltration or unauthorized database modifications in audit logs
Detection Strategies
- Implement web application firewall (WAF) rules to detect SQL injection patterns in requests to /borrowed_tool.php
- Monitor application logs for requests containing the emp parameter with suspicious characters such as single quotes, semicolons, or SQL keywords
- Deploy database activity monitoring to detect anomalous queries originating from the application user account
- Enable verbose database query logging and alert on queries with unusual structure or timing
Monitoring Recommendations
- Configure SIEM rules to correlate multiple failed or suspicious requests to the /borrowed_tool.php endpoint
- Set up alerts for database errors indicating syntax issues that may suggest injection attempts
- Monitor for signs of data exfiltration such as large result sets or queries against system tables
How to Mitigate CVE-2026-5675
Immediate Actions Required
- Restrict network access to the Construction Management System to trusted IP ranges or internal networks only
- Implement input validation on the emp parameter to allow only expected characters (alphanumeric values)
- Deploy a web application firewall with SQL injection protection rules enabled
- Review database user permissions and apply the principle of least privilege to limit potential damage
Patch Information
As of the last update on 2026-04-07, no official vendor patch has been released for this vulnerability. Organizations should monitor the IT Source Code website for security updates. Additional technical details and vulnerability tracking information can be found at VulDB Vulnerability #355501 and the GitHub Issue Report.
Workarounds
- Modify the /borrowed_tool.php file to use parameterized queries or prepared statements for all database interactions
- Implement server-side input validation that rejects any input containing SQL metacharacters
- Consider disabling or restricting access to the vulnerable endpoint until a proper fix can be implemented
- Apply database-level controls such as stored procedure usage to limit direct SQL execution
# Example: Apache .htaccess restriction for borrowed_tool.php
# Add to .htaccess in the application root directory
<Files "borrowed_tool.php">
Order Deny,Allow
Deny from all
Allow from 192.168.1.0/24
</Files>
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
