CVE-2025-3365 in OnlineSuite
Summary
by MITRE • 06/06/2025
A missing protection against path traversal allows to access any file on the server.
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Analysis
by VulDB Data Team • 06/06/2025
This vulnerability represents a critical path traversal flaw that undermines fundamental security controls within affected systems. The weakness stems from inadequate input validation mechanisms that fail to properly sanitize user-supplied file paths before processing. When applications do not adequately restrict directory traversal sequences such as ../ or ..\, attackers can manipulate file access requests to navigate beyond intended directories and access arbitrary files on the server filesystem. This type of vulnerability directly maps to CWE-22, which specifically addresses improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal attacks. The vulnerability exists at the application layer where file system operations are performed without proper authorization checks or path normalization routines.
The operational impact of this vulnerability extends far beyond simple unauthorized file access, as it can potentially expose sensitive system information including configuration files, database credentials, application source code, and user data. Attackers can leverage this weakness to escalate privileges, conduct data exfiltration, or establish persistent access points within the target environment. The severity is compounded by the fact that path traversal vulnerabilities often require minimal exploitation effort and can be automated through various attack frameworks. According to ATT&CK framework, this vulnerability aligns with T1083 (File and Directory Discovery) and T1566 (Phishing with Malicious Attachment) techniques, as attackers can use the access to gather intelligence and potentially deliver additional payloads. The vulnerability affects systems where file operations are performed using user-controllable inputs without proper validation, commonly found in web applications, file upload handlers, and content management systems.
Mitigation strategies must address both immediate remediation and long-term architectural improvements to prevent similar issues. The primary defense involves implementing strict input validation that filters or rejects suspicious path sequences before any file operations occur. Applications should normalize all file paths using secure libraries that resolve absolute paths and remove traversal components. Additionally, implementing proper access controls through principle of least privilege ensures that applications operate with minimal necessary permissions. Security measures should include regular code reviews focusing on file handling operations, deployment of web application firewalls that can detect and block path traversal attempts, and comprehensive testing including fuzzing and penetration testing to identify potential attack vectors. Organizations should also establish secure coding guidelines that explicitly prohibit unsafe file operations and mandate the use of validated libraries for path manipulation. The implementation of these controls directly addresses the root cause identified in CWE-22 and helps organizations meet compliance requirements while reducing attack surface exposure.