CVE-2022-1000 in TinyFileManager
Summary
by MITRE • 03/17/2022
Path Traversal in GitHub repository prasathmani/tinyfilemanager prior to 2.4.7.
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Analysis
by VulDB Data Team • 12/31/2025
The vulnerability identified as CVE-2022-1000 represents a critical path traversal flaw discovered in the prasathmani/tinyfilemanager GitHub repository, affecting versions prior to 2.4.7. This repository serves as a lightweight file manager web application designed for basic file operations through a web interface, making it a common target for attackers seeking unauthorized access to server resources. The vulnerability stems from insufficient input validation and sanitization within the application's file handling mechanisms, specifically when processing user-supplied paths that are used to access files on the server filesystem. The flaw allows malicious actors to manipulate file path parameters to navigate outside the intended directory structure and access restricted files or directories that should remain protected from user interaction.
The technical exploitation of this path traversal vulnerability occurs when the application fails to properly validate or sanitize user input before using it in file system operations. Attackers can craft malicious requests containing sequences such as ../ or ..\ that bypass directory restrictions and enable access to files outside the designated web root or user-accessible directories. This vulnerability falls under the Common Weakness Enumeration category CWE-22, which specifically addresses improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal attacks. The attack vector typically involves manipulating parameters in file operations such as file listing, file viewing, file downloading, or file uploading functions where user input directly influences the file path resolution process. When the application processes these manipulated paths without proper validation, it executes the file system operations with the attacker-controlled paths, potentially leading to unauthorized file access, data leakage, or even remote code execution depending on the server configuration and file permissions.
The operational impact of CVE-2022-1000 extends beyond simple unauthorized file access, as it can potentially lead to complete system compromise when combined with other vulnerabilities or when the application has elevated privileges. An attacker exploiting this vulnerability can access sensitive configuration files, database credentials, application source code, log files, and other critical system information that may reveal further attack vectors or compromise additional systems. The vulnerability's severity is amplified in environments where the file manager application has access to sensitive directories or where the web server is configured to allow access to restricted system paths. Organizations using this file manager application are particularly at risk if the application is deployed in production environments without proper input validation, as even a single unpatched instance can provide attackers with a foothold to escalate privileges or access other systems within the network. The vulnerability can also be leveraged in combination with other attack techniques such as cross-site scripting or command injection to create more sophisticated attack chains that exploit multiple weaknesses within the application stack.
Mitigation strategies for CVE-2022-1000 focus primarily on implementing proper input validation and sanitization mechanisms within the application code, specifically ensuring that all user-supplied path parameters are properly validated before being used in file system operations. The most effective remediation approach involves implementing a whitelist-based validation system that only allows predefined safe paths or using secure path resolution functions that prevent traversal sequences from being processed. Organizations should immediately upgrade to version 2.4.7 or later of the prasathmani/tinyfilemanager repository, which includes proper input validation fixes. Additional security measures include implementing proper access controls and privilege separation, ensuring that the application runs with minimal required permissions, and using secure coding practices such as the principle of least privilege when designing file access operations. Network-level mitigations such as web application firewalls and intrusion detection systems can help detect and block suspicious path traversal attempts, while regular security audits and code reviews should be conducted to identify similar vulnerabilities in other applications within the organization's infrastructure. The vulnerability also highlights the importance of maintaining up-to-date third-party libraries and applications, as unpatched components represent significant attack surfaces that can be exploited by adversaries following the tactics documented in the MITRE ATT&CK framework under the T1059.007 technique for command and scripting interpreter and T1078.004 technique for valid accounts, as attackers often leverage path traversal vulnerabilities to gain access to system resources that can then be used for further compromise.