CVE-2025-43948 in KLIMS
Summary
by MITRE • 04/22/2025
Codemers KLIMS 1.6.DEV allows Python code injection. A user can provide Python code as an input value for a parameter or qualifier (such as for sorting), which will get executed on the server side.
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Analysis
by VulDB Data Team • 05/25/2025
The vulnerability identified as CVE-2025-43948 affects Codemers KLIMS version 1.6.DEV and represents a critical server-side code execution flaw that stems from improper input validation and sanitization. This vulnerability allows remote attackers to inject and execute arbitrary Python code on the target system by manipulating parameter values or qualifiers used for operations such as sorting. The flaw occurs when the application directly evaluates or executes user-provided input without adequate sanitization, creating a direct pathway for malicious code execution.
This vulnerability maps to CWE-94, which describes "Improper Control of Generation of Code ('Code Injection')" and falls under the broader category of injection flaws that enable attackers to execute arbitrary code on affected systems. The technical implementation of this flaw involves the application's handling of user-supplied parameters that are subsequently processed through Python's evaluation mechanisms or similar code execution functions. When sorting or other operational parameters accept user input and this input contains executable Python code, the system processes it without proper validation, leading to unauthorized code execution.
The operational impact of this vulnerability is severe and multifaceted. An attacker who successfully exploits this flaw can gain full control over the affected server, potentially leading to data breaches, system compromise, and further lateral movement within the network. The vulnerability enables arbitrary code execution, which aligns with ATT&CK technique T1059.001 for Command and Scripting Interpreter and T1021.004 for Remote Services. The attacker can execute commands with the privileges of the affected service account, potentially escalating to system-level access depending on the execution context.
Mitigation strategies for this vulnerability should focus on implementing comprehensive input validation and sanitization measures. The primary defense involves removing or properly escaping user input before it is processed or evaluated by the application. Input should be validated against a strict whitelist of acceptable values and sanitized to remove or encode potentially dangerous characters. Additionally, the application should avoid using dynamic code execution functions such as eval() or exec() with user-controllable input. Implementing proper parameterized queries and using secure coding practices for handling user input can effectively prevent this type of injection attack. Organizations should also consider implementing web application firewalls and intrusion detection systems to monitor for suspicious patterns of exploitation attempts. Regular security assessments and code reviews should be conducted to identify and remediate similar vulnerabilities in the application's codebase.