CVE-2026-24418: Openstamanager SQL Injection Vulnerability

CVE-2026-24418 Overview

CVE-2026-24418 is an Error-Based SQL Injection vulnerability affecting OpenSTAManager, an open source management software for technical assistance and invoicing. The vulnerability exists in the bulk operations handler for the Scadenzario (Payment Schedule) module. The application fails to validate that elements of the id_records array are integers before using them in an SQL IN() clause, allowing attackers to inject arbitrary SQL commands and extract sensitive data through XPATH error messages.

Critical Impact

Authenticated attackers can exploit this SQL Injection vulnerability to extract sensitive database information including customer data, invoices, financial records, and potentially administrative credentials stored in OpenSTAManager.

Affected Products

• OpenSTAManager v2.9.8 and earlier versions
• Devcode OpenSTAManager (all versions prior to patched release)

Discovery Timeline

• 2026-02-06 - CVE-2026-24418 published to NVD
• 2026-02-09 - Last updated in NVD database

Technical Details for CVE-2026-24418

Vulnerability Analysis

This Error-Based SQL Injection vulnerability stems from insufficient input validation in the Scadenzario (Payment Schedule) module's bulk operations handler. When processing bulk operations, the application accepts an array parameter called id_records which is intended to contain integer identifiers for payment schedule entries. However, the application fails to validate or sanitize these array elements before incorporating them directly into a dynamically constructed SQL IN() clause.

The lack of proper type checking allows an attacker to submit crafted payloads within the id_records array elements. Because the application uses error-based extraction techniques, specifically leveraging XPATH error messages, attackers can systematically exfiltrate sensitive data from the underlying database by triggering controlled SQL errors that expose query results within error output.

This vulnerability requires authentication to exploit, meaning an attacker must have valid credentials for the OpenSTAManager application. However, once authenticated—even with minimal privileges—the attacker can leverage this flaw to access data beyond their authorization level, potentially compromising the entire database.

Root Cause

The root cause is improper input validation (CWE-89: Improper Neutralization of Special Elements used in an SQL Command). The application directly incorporates user-supplied array values into SQL queries without proper type validation, parameterized queries, or adequate input sanitization. Specifically, the id_records array elements are expected to be integers but are not validated as such before being concatenated into the SQL IN() clause.

Attack Vector

The attack vector is network-based and requires low-privilege authentication to the OpenSTAManager application. An attacker with valid credentials can manipulate the id_records parameter in requests to the bulk operations handler within the Scadenzario module. By injecting SQL syntax into array elements, the attacker can modify the intended query structure.

The exploitation technique uses XPATH-based error extraction, where specially crafted SQL injection payloads cause the database to return error messages containing sensitive data. This allows for systematic data exfiltration without requiring direct query output—the error messages themselves become the data extraction channel.

The vulnerability can be exploited by sending malicious HTTP requests to the affected endpoint with crafted id_records array values containing SQL injection payloads that leverage functions like EXTRACTVALUE() or UPDATEXML() to trigger informative XPATH errors.

Detection Methods for CVE-2026-24418

Indicators of Compromise

• Unusual HTTP requests to the Scadenzario module's bulk operations endpoint containing non-integer values in the id_records parameter
• Database error logs showing XPATH-related errors or EXTRACTVALUE()/UPDATEXML() function calls in unexpected contexts
• Abnormal patterns of authentication followed by immediate bulk operation requests with malformed parameters
• Web application logs showing repeated requests with SQL syntax characters (single quotes, parentheses, SQL keywords) in array parameters

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect SQL injection patterns in array parameters, particularly those targeting IN() clause injection
• Implement database activity monitoring to alert on XPATH error functions being invoked in non-standard query contexts
• Configure application logging to capture and alert on bulk operations requests with non-numeric id_records values
• Enable SQL error logging and monitor for patterns consistent with error-based data extraction attempts

Monitoring Recommendations

• Monitor authentication logs for accounts performing unusual patterns of bulk operations immediately after login
• Set up alerting for database errors containing XPATH-related messages from the OpenSTAManager application context
• Review web server access logs for requests to the Scadenzario bulk operations endpoint with suspicious parameter patterns
• Implement anomaly detection for request patterns that deviate from normal bulk operation usage

How to Mitigate CVE-2026-24418

Immediate Actions Required

• Review the GitHub Security Advisory for vendor-specific guidance and patch availability
• Restrict network access to OpenSTAManager installations to trusted networks only
• Implement Web Application Firewall rules to filter SQL injection attempts targeting array parameters
• Audit user accounts and remove or disable any unnecessary privileged access
• Enable detailed logging for the Scadenzario module to detect exploitation attempts

Patch Information

Refer to the official GitHub Security Advisory GHSA-4xwv-49c8-fvhq for the latest patch information and updated version releases from Devcode. Organizations running OpenSTAManager v2.9.8 or earlier should prioritize upgrading to the patched version as soon as it becomes available.

Workarounds

• Place OpenSTAManager behind a reverse proxy with WAF capabilities configured to detect and block SQL injection patterns
• Restrict access to the Scadenzario module's bulk operations functionality to only essential administrative users
• Implement network segmentation to limit database access and reduce the impact of potential exploitation
• Consider temporarily disabling bulk operations in the Payment Schedule module until the patch is applied

# Example: Apache ModSecurity rule to detect SQL injection in array parameters
# Add to your ModSecurity configuration
SecRule ARGS "@detectSQLi" \
    "id:1001,\
    phase:2,\
    block,\
    msg:'SQL Injection Attempt Detected in Request Parameters',\
    log,\
    severity:'CRITICAL'"