CVE-2026-41876 in DMS
Summary
by MITRE • 07/10/2026
R-SOFT DMS is vulnerable to OS Command Injection in konwertujAction() function. The document converter executes shell commands using unsanitized file paths and format parameters. This allows an authenticated attacker to execute arbitrary system commands with the privileges of the web server user.
This issue was fixed in version v3.19-2752 and v3.17-2580.
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Analysis
by VulDB Data Team • 07/10/2026
The R-SOFT DMS vulnerability represents a critical operating system command injection flaw within the konwertujAction() function that fundamentally compromises system security through improper input validation. This weakness enables authenticated attackers to manipulate file paths and format parameters, which are then directly incorporated into shell commands without adequate sanitization or escaping mechanisms. The vulnerability exists at the application layer where user-supplied data flows directly into system command execution contexts, creating an avenue for arbitrary code execution that operates with the privileges of the web server process.
The technical implementation of this flaw demonstrates a classic command injection pattern where unsanitized parameters are concatenated into shell command strings, violating fundamental security principles of input validation and output encoding. When an authenticated user submits malicious input through the document conversion functionality, the system processes these parameters directly within shell execution contexts without proper parameterization or context-aware escaping. This design flaw aligns with CWE-78, which specifically addresses operating system command injection vulnerabilities where untrusted data is incorporated into command strings without proper sanitization.
The operational impact of this vulnerability extends beyond simple code execution to encompass complete system compromise when attackers leverage the elevated privileges granted by web server processes. An authenticated attacker can potentially execute commands such as file manipulation, network reconnaissance, privilege escalation, or even establish persistent backdoors within the affected environment. The security implications are particularly severe because the vulnerability requires only authentication credentials to exploit, making it accessible to both internal users and potential attackers who have gained legitimate access to the system.
The remediation implemented in versions v3.19-2752 and v3.17-2580 demonstrates proper vulnerability management through input sanitization and command parameterization techniques that align with industry best practices. These fixes likely incorporate proper escaping of shell metacharacters, implementation of parameterized command execution, or complete removal of direct shell command construction from user inputs. The resolution addresses the root cause by ensuring that all user-supplied parameters undergo rigorous validation and sanitization before being used in system command contexts, thereby preventing the injection of malicious commands through the konwertujAction() function.
From a threat modeling perspective, this vulnerability maps to several ATT&CK techniques including T1059.001 for command and script interpreter execution and T1068 for local privilege escalation. The attack surface remains significant even after patching since the vulnerability could be exploited by malicious insiders or compromised accounts, making comprehensive security monitoring essential. Organizations should implement proper web application firewall rules to detect suspicious command injection patterns, conduct regular penetration testing of document processing functionalities, and maintain updated security configurations that align with NIST SP 800-53 requirements for input validation and privilege separation controls.
Security practitioners must recognize this vulnerability as a prime example of why application-level input sanitization cannot be overlooked in enterprise environments where document management systems process untrusted user data. The fix demonstrates the importance of following secure coding practices that prevent direct command construction from user inputs, which represents a fundamental security control that should be implemented across all system components handling external data processing. Continuous monitoring and logging of document conversion activities remains crucial for detecting potential exploitation attempts or unauthorized access patterns that may indicate successful exploitation of similar vulnerabilities within the broader system infrastructure.