CVE-2026-50769 in Crm+
Summary
by MITRE • 08/17/2026
The CRM+ application before and including version 2025.6 from Brainformatik is vulnerable to SQL Injection (time-based) vulnerability. The check conflict endpoint index.php?module=Appointments&action=CheckConflictOfDates&ajaxSkipHeader=true which is used to check any conflicts for user calendar is vulnerable to SQL injection allowing an attacker to execute arbitrary code.
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Analysis
by VulDB Data Team • 08/17/2026
The CRM+ application, developed by Brainformatik and specifically affecting versions up through 2025.6, contains a critical security flaw classified as a time-based blind SQL injection vulnerability. This weakness resides within the application's appointment management subsystem, particularly in the endpoint responsible for validating scheduling conflicts. The specific entry point identified is index.php with parameters module=Appointments&action=CheckConflictOfDates&ajaxSkipHeader=true. This functionality is designed to query the database to determine if a proposed date and time slot overlaps with existing appointments for a given user, thereby preventing double-booking scenarios within the calendar interface.
The technical root cause of this vulnerability stems from insufficient input validation and sanitization mechanisms applied to parameters passed via HTTP requests before they are incorporated into SQL queries executed by the backend database engine. When an attacker submits crafted input containing malicious SQL syntax or logical operators designed to manipulate query execution time, the application fails to properly escape these inputs. Consequently, the injected code is interpreted as part of the legitimate SQL statement rather than being treated as raw data. The use of a time-based blind technique implies that the vulnerability does not return direct error messages or result sets in the response body, but instead causes measurable delays in query execution when specific conditions are met. This allows an attacker to infer database structure and extract sensitive information bit by bit based on whether the server responds within expected timeframes or experiences deliberate latency due to sleep functions or complex logical evaluations embedded in the injection payload.
From a threat modeling perspective, this vulnerability aligns with CWE-89, which describes Improper Neutralization of Special Elements used in an SQL Command, commonly known as SQL Injection. Furthermore, it maps directly to MITRE ATT&CK technique T1059.004, specifically the use of SQL commands for unauthorized access and data exfiltration via client-side input manipulation. The operational impact is severe because CRM+ typically handles sensitive customer relationship management data, including personal identifiable information, contact details, communication logs, and potentially financial records associated with appointments or services. An attacker leveraging this time-based blind injection can bypass authentication controls if the underlying query logic permits it, although even without direct access to admin panels, the ability to read arbitrary database tables poses a significant risk of large-scale data breach. The stealthy nature of time-based extraction makes detection by standard intrusion detection systems more challenging compared to error-based or union-based injections that might trigger obvious application errors visible in HTTP responses.
Mitigation strategies must address both immediate remediation and long-term architectural improvements. Developers should immediately patch the affected version by upgrading CRM+ to a release where this specific endpoint has been secured with parameterized queries or prepared statements, ensuring that user-supplied input is never concatenated directly into SQL strings. Input validation routines must be strengthened to reject any non-alphanumeric characters in fields expected to contain only dates and times, utilizing strict type checking on the server side rather than relying solely on client-side JavaScript restrictions which can be easily bypassed using proxy tools like Burp Suite or OWASP ZAP. Additionally, implementing Web Application Firewall rules that detect common SQL injection patterns such as UNION SELECT, OR 1=1, and time-delay functions like SLEEP() or WAITFOR DELAY can provide a layer of defense in depth while patches are being deployed. Database access privileges should also be reviewed to ensure the application user account operates with minimal necessary permissions, preventing an attacker from accessing system tables or performing administrative actions even if injection is successful. Regular security audits and static code analysis tools integrated into the CI/CD pipeline will help identify similar vulnerabilities across other endpoints before they reach production environments.