CVE-2026-75413 in DocSys
Summary
by MITRE • 08/27/2026
DocSys V2.02.80 is vulnerable to Any File Download. An attacker does not need to go through authentication to utilize the downloadDocEx.do interface and download any file via the parameter targetPath.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 08/27/2026
The vulnerability identified in DocSys version 2.02.80 represents a critical security flaw classified as an Unrestricted File Download, which aligns with CWE-531 within the Common Weakness Enumeration taxonomy. This specific weakness occurs when a software application allows users to specify arbitrary file paths for download operations without adequate validation or restriction mechanisms. In this instance, the vulnerability is located in the downloadDocEx.do interface, which serves as an entry point for retrieving documents from the server's filesystem. The core technical flaw lies in the improper handling of the targetPath parameter provided by the client request. Instead of validating that the requested file resides within a designated secure directory or restricting access to authorized resources only, the application directly utilizes this input to construct the path to the file on disk. This lack of sanitization allows an attacker to manipulate the path traversal sequences, such as using dot-dot-slash characters, to escape the intended document root and access sensitive system files located elsewhere in the filesystem hierarchy.
A defining characteristic of this vulnerability is its unauthenticated nature, which significantly lowers the barrier for exploitation. Typically, file download vulnerabilities may require some level of user authentication or session validation before a malicious actor can attempt path traversal attacks. However, because DocSys 2.02.80 does not enforce any form of identity verification prior to processing requests sent to the downloadDocEx.do endpoint, an anonymous attacker can interact with this interface directly over the network. This absence of access control means that anyone who knows or discovers the URL structure for this specific action can initiate a download request without providing credentials. The operational impact is severe, as it potentially exposes sensitive internal documents, configuration files containing database connection strings or API keys, and other proprietary data stored on the server. In worst-case scenarios, if the web application runs with elevated privileges, an attacker might be able to read critical system configuration files that could facilitate further attacks against the underlying operating system or network infrastructure.
From a threat intelligence perspective, this vulnerability maps directly to the ATT&CK technique of T1083, which covers File and Directory Discovery, specifically through remote file retrieval mechanisms. The ability to download arbitrary files effectively grants an attacker reconnaissance capabilities regarding the server's internal structure and data assets. This can serve as a precursor to more destructive actions such as credential theft or lateral movement within a compromised network environment. To mitigate this risk, immediate remediation steps should focus on implementing strict input validation for all file path parameters. Developers must ensure that user-supplied paths are resolved against an absolute base directory and then verified to remain within that boundary before any I/O operations are performed. Additionally, employing allowlists for permitted file extensions can provide an extra layer of defense by preventing the download of executable or script files that could be executed on a client machine if misinterpreted. It is also advisable to implement authentication checks on all sensitive endpoints, ensuring that only authorized users with appropriate roles can access document retrieval functions. Regular security audits and static code analysis tools should be employed during development cycles to detect such path traversal weaknesses before deployment into production environments.