CVE-2026-92533 in BugTracker.NET
Summary
by MITRE • 10/07/2026
Path traversal vulnerability in the BugTracker.NET file download component. The parameter used to specify the file name does not properly validate user-supplied paths. An authenticated remote attacker could enter a manipulated path to access files located outside the intended directory. Successful exploitation could allow the attacker to read system files accessible to the account used by the application.
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Analysis
by VulDB Data Team • 10/07/2026
The vulnerability identified in BugTracker.NET represents a classic instance of insecure direct object references combined with insufficient input validation, specifically manifesting as a path traversal flaw within its file download functionality. This security defect arises from the application's failure to properly sanitize or canonicalize user-supplied filenames before processing them for retrieval operations. When an authenticated remote attacker interacts with this component, they can inject directory traversal sequences, such as dot-dot-slash characters, into the filename parameter. Because the underlying system does not strictly enforce that the requested file resides within the designated application directory structure, these malicious inputs allow the request to escape the intended sandbox and traverse up the filesystem hierarchy. This lack of validation is a critical oversight in web application security design, where developers often assume that authentication alone provides sufficient boundary protection without implementing strict path containment logic.
From a technical perspective, this flaw aligns directly with CWE-22: Improper Limitation of a Pathname to a Restricted Directory. The core issue lies in the absence of robust canonicalization and validation mechanisms before file access is attempted. By manipulating the input string, an attacker can bypass directory restrictions that are typically enforced by web servers or application frameworks when standard paths are provided. Instead of retrieving only files from the allowed root folder, the server resolves the relative path against the current working directory, potentially reaching sensitive areas of the operating system's file structure. This behavior is particularly dangerous because it exploits the trust relationship between the authenticated user and the application's resource access controls, effectively elevating the scope of data exposure beyond what was originally intended by the software architecture.
The operational impact of this vulnerability is significant for organizations relying on BugTracker.NET for project management and tracking. Successful exploitation enables an attacker to read arbitrary system files accessible to the account under which the web server process executes. Depending on the configuration, this could include sensitive application configuration files containing database credentials, internal logs revealing network topology or user activities, or even operating system-specific files that might aid in further lateral movement within a compromised environment. While the requirement for authentication limits the attack surface compared to unauthenticated vulnerabilities, it does not mitigate the risk entirely since valid credentials can be obtained through phishing, credential stuffing, or other compromise methods. Once inside, the ability to read arbitrary files serves as a powerful reconnaissance tool that facilitates deeper system compromise and data exfiltration.
In terms of threat modeling and industry frameworks, this vulnerability maps to ATT&CK technique T1083: File and Directory Discovery. Attackers utilize such flaws to enumerate and access local resources on compromised systems, which is often a precursor to more destructive actions like ransomware deployment or persistent backdoor installation. The exploitation vector falls under CWE-20: Improper Input Validation, highlighting the fundamental failure in processing external data safely. To mitigate this risk, developers must implement strict allow-listing for file names and ensure that all requested paths are resolved to their absolute canonical forms before access is granted. Additionally, applying the principle of least privilege by running the web application under a restricted service account with minimal filesystem permissions can significantly reduce the impact if exploitation occurs. Regular security code reviews focusing on file I/O operations and automated static analysis tools configured to detect path traversal patterns are essential preventive measures for maintaining robust application security posture.