CVE-2025-40656: DM Corporative CMS SQLi Vulnerability

CVE-2025-40656 Overview

A critical SQL injection vulnerability has been identified in DM Corporative CMS, a content management system developed by ACC. This vulnerability exists in the /administer/node-selection/data.asp endpoint, where the cod parameter fails to properly sanitize user-supplied input before incorporating it into SQL queries. An unauthenticated remote attacker can exploit this flaw to retrieve, create, update, and delete database contents, potentially compromising the entire backend database system.

Critical Impact

Unauthenticated attackers can fully compromise database integrity, confidentiality, and availability through SQL injection in the cod parameter, enabling complete data exfiltration and manipulation.

Affected Products

• DM Corporative CMS (all versions)
• ACC DM Corporative CMS deployments using the vulnerable /administer/node-selection/data.asp endpoint

Discovery Timeline

• June 10, 2025 - CVE-2025-40656 published to NVD
• October 23, 2025 - Last updated in NVD database

Technical Details for CVE-2025-40656

Vulnerability Analysis

This vulnerability is classified as CWE-89 (SQL Injection), representing one of the most severe web application security flaws. The vulnerable endpoint /administer/node-selection/data.asp accepts the cod parameter without implementing proper input validation or parameterized queries. When malicious SQL syntax is injected through this parameter, the application directly concatenates the input into SQL statements, allowing attackers to manipulate the underlying database queries.

The network-accessible nature of this vulnerability means attackers can exploit it remotely without requiring any prior authentication or user interaction. Successful exploitation grants full database access, including the ability to read sensitive data, modify existing records, insert malicious content, and delete critical information.

Root Cause

The root cause of this vulnerability stems from insufficient input validation and the use of dynamic SQL query construction. The application directly incorporates user-supplied data from the cod parameter into SQL queries without sanitization, escaping, or the use of prepared statements. This classic SQL injection pattern occurs when developers trust user input and fail to implement secure coding practices for database interactions.

Attack Vector

The vulnerability is exploitable over the network by sending crafted HTTP requests to the /administer/node-selection/data.asp endpoint. An attacker injects malicious SQL statements through the cod parameter, which are then executed by the database server with the privileges of the application's database connection. This allows attackers to bypass authentication, extract sensitive information from database tables, modify or delete data, and potentially gain further system access depending on the database configuration and privileges.

The attack requires no authentication or special privileges, making it particularly dangerous for internet-facing DM Corporative CMS installations. Attackers can use standard SQL injection techniques including UNION-based attacks, blind SQL injection, and time-based injection to enumerate database structure and extract data.

Detection Methods for CVE-2025-40656

Indicators of Compromise

• Unusual or malformed requests to /administer/node-selection/data.asp containing SQL syntax characters such as single quotes, UNION statements, or comment delimiters
• Database error messages appearing in HTTP responses or logs indicating SQL syntax errors
• Unexpected database queries or operations appearing in database audit logs
• Signs of data exfiltration or unauthorized database modifications

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect and block SQL injection patterns targeting the cod parameter
• Implement intrusion detection system (IDS) signatures for common SQL injection attack payloads
• Configure application logging to capture all requests to administrative endpoints including full parameter values
• Enable database query logging to identify anomalous or malicious SQL statements

Monitoring Recommendations

• Monitor web server access logs for requests to /administer/node-selection/data.asp with suspicious parameter values
• Set up alerts for database errors or exceptions that may indicate injection attempts
• Track database activity for unauthorized data access or modification patterns
• Review authentication logs for bypass attempts or unauthorized administrative access

How to Mitigate CVE-2025-40656

Immediate Actions Required

• Restrict network access to the /administer/node-selection/data.asp endpoint using firewall rules or access control lists
• Deploy a Web Application Firewall (WAF) with SQL injection protection rules
• Consider temporarily disabling the affected administrative functionality until a patch is available
• Audit database logs and application access logs for evidence of exploitation attempts

Patch Information

Organizations should consult the INCIBE Security Notice for the latest information on available patches and vendor guidance. Contact ACC directly for patch availability and upgrade instructions for DM Corporative CMS.

Workarounds

• Implement IP-based access restrictions to limit access to administrative endpoints to trusted networks only
• Deploy input validation at the network perimeter using WAF rules to filter SQL injection patterns
• If possible, modify the application to use parameterized queries or prepared statements for the affected endpoint
• Consider implementing additional authentication requirements for accessing administrative functionality

For environments where the affected component cannot be immediately patched, network segmentation and strict access controls provide defense-in-depth protection while awaiting vendor remediation.