CVE-2023-26820 in siteproxy
Summary
by MITRE • 04/07/2023
siteproxy v1.0 was discovered to contain a path traversal vulnerability via the component index.js.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 11/12/2025
The vulnerability identified as CVE-2023-26820 affects siteproxy version 1.0 and represents a critical path traversal flaw within the index.js component. This type of vulnerability allows attackers to access files and directories that should normally be restricted through improper input validation mechanisms. The issue stems from the application's failure to adequately sanitize user-supplied input that is used to construct file paths, creating an opportunity for malicious actors to manipulate the application's behavior by accessing arbitrary files on the underlying filesystem. Such vulnerabilities are particularly dangerous because they can enable unauthorized data access, system compromise, and potentially full system control depending on the application's permissions and configuration.
The technical exploitation of this path traversal vulnerability occurs when the index.js component processes user input without proper validation or sanitization, allowing attackers to inject malicious path sequences such as ../ or ..\ that can navigate outside the intended directory structure. This flaw aligns with 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 can be leveraged to access sensitive system files, configuration data, or application source code that should remain protected from unauthorized access. Attackers can potentially retrieve database credentials, application secrets, or other confidential information stored in accessible locations, making this a significant security concern for any system utilizing the affected software.
The operational impact of this vulnerability extends beyond simple data theft, as successful exploitation can lead to complete system compromise and persistent access. An attacker who successfully exploits this vulnerability can potentially escalate privileges, install backdoors, or use the compromised system as a pivot point to attack other systems within the network. The attack surface is particularly concerning given that siteproxy is designed as a proxy service, which typically operates with elevated privileges and may have access to sensitive network resources or internal systems. This vulnerability can be exploited through various attack vectors including web interface manipulation, API calls, or direct network requests, making it challenging to defend against without proper input validation and access controls. The impact is further amplified when considering that proxy services often handle sensitive traffic and may process data from multiple sources, creating a potential attack vector for data exfiltration or man-in-the-middle attacks.
Mitigation strategies for this vulnerability must focus on implementing robust input validation and sanitization mechanisms within the index.js component to prevent malicious path sequences from being processed. Organizations should immediately update to the latest version of siteproxy where this vulnerability has been patched, as the maintainers have likely implemented proper path validation and normalization techniques. Security measures should include implementing proper access controls, using secure coding practices that prevent path traversal attacks, and deploying web application firewalls that can detect and block malicious path traversal attempts. The implementation of the principle of least privilege should be enforced, ensuring that the proxy service operates with minimal necessary permissions and access rights to reduce the potential impact of successful exploitation. Additionally, regular security assessments and penetration testing should be conducted to identify and remediate similar vulnerabilities in other components of the system, with particular attention to any other applications or services that may be susceptible to the same class of path traversal attacks. Organizations should also implement monitoring and logging mechanisms to detect suspicious file access patterns that may indicate exploitation attempts, aligning with defensive strategies outlined in the MITRE ATT&CK framework for command and control activities and privilege escalation techniques.