CVE-2025-40654: DM Corporative CMS SQLi Vulnerability

CVE-2025-40654 Overview

A critical SQL injection vulnerability has been discovered in DM Corporative CMS, a content management system developed by ACC. This vulnerability exists in the /antbuspre.asp endpoint and allows unauthenticated attackers to manipulate SQL queries through the name and cod parameters. Successful exploitation enables attackers to retrieve, create, update, and delete database records, potentially leading to complete database compromise.

Critical Impact

Unauthenticated attackers can exploit this SQL injection vulnerability to gain full read/write access to backend databases, enabling data theft, data manipulation, and potential complete system compromise.

Affected Products

• DM Corporative CMS (all versions)
• ACC DM Corporative CMS web deployments
• Systems using the vulnerable /antbuspre.asp endpoint

Discovery Timeline

• 2025-06-10 - CVE-2025-40654 published to NVD
• 2025-10-23 - Last updated in NVD database

Technical Details for CVE-2025-40654

Vulnerability Analysis

This SQL injection vulnerability stems from improper input validation in the DM Corporative CMS web application. The vulnerable endpoint /antbuspre.asp accepts user-supplied input through the name and cod parameters without adequate sanitization or parameterized query implementation. This allows attackers to inject arbitrary SQL statements that are executed directly against the backend database.

The vulnerability is network-exploitable and requires no authentication or user interaction, making it particularly dangerous for internet-facing deployments. An attacker can leverage this flaw to perform full CRUD (Create, Read, Update, Delete) operations on the database, potentially extracting sensitive information, modifying critical data, or destroying database contents entirely.

Root Cause

The root cause of this vulnerability is improper input validation (CWE-89: Improper Neutralization of Special Elements used in an SQL Command). The application fails to properly sanitize user input before incorporating it into SQL queries. The name and cod parameters in /antbuspre.asp are directly concatenated into SQL statements without using prepared statements, parameterized queries, or input filtering, allowing attackers to escape the intended query context and inject malicious SQL code.

Attack Vector

The attack vector for CVE-2025-40654 is network-based, allowing remote exploitation without authentication. An attacker can craft malicious HTTP requests to the /antbuspre.asp endpoint with specially crafted values in the name or cod parameters. These parameters are vulnerable to classic SQL injection techniques including:

• Union-based injection to extract data from other tables
• Boolean-based blind injection to infer database contents
• Time-based blind injection for data exfiltration
• Stacked queries (if supported) to execute multiple SQL statements

The vulnerability allows attackers to bypass application logic entirely and interact directly with the database management system, potentially escalating to operating system command execution if database features like xp_cmdshell are available.

Detection Methods for CVE-2025-40654

Indicators of Compromise

• Unusual HTTP requests to /antbuspre.asp containing SQL syntax characters such as single quotes ('), double dashes (--), or UNION SELECT statements
• Web server logs showing requests with encoded SQL injection payloads in name or cod parameters
• Database logs indicating unexpected queries, failed authentication attempts, or bulk data extraction operations
• Anomalous database activity including unauthorized schema queries or access to system tables

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect and block SQL injection patterns targeting the name and cod parameters
• Implement intrusion detection system (IDS) signatures for common SQL injection payloads in HTTP traffic
• Enable detailed database query logging and monitor for suspicious query patterns or unauthorized data access
• Configure application-level logging to capture all requests to /antbuspre.asp for forensic analysis

Monitoring Recommendations

• Monitor web server access logs for requests to /antbuspre.asp with suspicious query string patterns
• Set up alerting for database errors that may indicate injection attempts, such as syntax errors or privilege violations
• Implement real-time monitoring of database connections and queries from the web application service account
• Track data exfiltration indicators such as unusually large response sizes or bulk SELECT operations

How to Mitigate CVE-2025-40654

Immediate Actions Required

• Restrict or disable access to the /antbuspre.asp endpoint until a patch is available
• Implement Web Application Firewall rules to filter SQL injection attempts targeting the vulnerable parameters
• Review database account permissions used by the CMS and apply the principle of least privilege
• Enable comprehensive logging on web servers and database systems to detect exploitation attempts

Patch Information

At the time of publication, no vendor patch has been officially released. Organizations should monitor the INCIBE Security Notice for updates and patch availability from ACC. Contact the vendor directly for remediation guidance and security updates.

Workarounds

• Deploy a Web Application Firewall (WAF) with SQL injection detection rules in front of the DM Corporative CMS application
• Implement network segmentation to limit database server exposure and restrict access from the web tier
• Consider taking the vulnerable endpoint offline or implementing IP-based access restrictions until a patch is available
• If source code access is available, implement parameterized queries or prepared statements for the name and cod parameters in /antbuspre.asp

# Example WAF rule to block SQL injection attempts (ModSecurity)
SecRule ARGS:name|ARGS:cod "@detectSQLi" \
    "id:1001,\
    phase:2,\
    block,\
    log,\
    msg:'SQL Injection attempt detected in DM Corporative CMS parameters',\
    logdata:'Matched Data: %{MATCHED_VAR}'"