CVE-2024-55657 in SiYuan
Summary
by MITRE • 12/12/2024
SiYuan is a personal knowledge management system. Prior to version 3.1.16, an arbitrary file read vulnerability exists in Siyuan's `/api/template/render` endpoint. The absence of proper validation on the path parameter allows attackers to access sensitive files on the host system. Version 3.1.16 contains a patch for the issue.
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Analysis
by VulDB Data Team • 06/06/2025
The vulnerability CVE-2024-55657 affects SiYuan, a personal knowledge management system that enables users to organize and manage their digital information. This arbitrary file read vulnerability resides within the application's `/api/template/render` endpoint, representing a critical security flaw that exposes the system to unauthorized data access. The vulnerability stems from insufficient input validation mechanisms that fail to properly sanitize the path parameter, allowing malicious actors to craft requests that traverse the file system and retrieve sensitive information from the host environment. The affected versions prior to 3.1.16 demonstrate a clear lack of proper access controls and path validation, creating an attack surface that could be exploited by threat actors to gain unauthorized access to system files, configuration data, and potentially user information stored on the server.
The technical implementation of this vulnerability aligns with common web application security flaws categorized under CWE-22, which describes improper limitation of a pathname to a restricted directory, also known as path traversal or directory traversal attacks. Attackers can exploit this weakness by manipulating the path parameter in the API endpoint to navigate through the file system hierarchy and access files outside of the intended directory structure. The vulnerability represents a direct violation of the principle of least privilege, where the application fails to enforce proper boundaries around file system access, allowing attackers to read files that should remain protected. This type of vulnerability is particularly dangerous in knowledge management systems where sensitive personal and organizational data may be stored in various file formats and locations within the system.
The operational impact of this vulnerability extends beyond simple information disclosure, as it could enable attackers to access critical system components, configuration files, and potentially sensitive user data. In the context of personal knowledge management systems, this exposure could lead to unauthorized access to private documents, notes, and other confidential information that users trust the system to protect. The vulnerability may also facilitate further attacks by allowing threat actors to discover system configurations, database credentials, or other sensitive information that could be used for privilege escalation or lateral movement within the network. According to ATT&CK framework category T1566, this vulnerability represents an initial access vector that could be leveraged for more sophisticated attacks, potentially leading to complete system compromise.
Mitigation strategies for CVE-2024-55657 involve immediate deployment of the patched version 3.1.16, which implements proper input validation and path sanitization mechanisms. Organizations should also implement additional protective measures including input validation at multiple layers, proper file access controls, and regular security assessments of web applications. The fix should include comprehensive path validation that prevents directory traversal attempts, proper authentication and authorization checks, and logging mechanisms to detect suspicious file access patterns. Security teams should also consider implementing web application firewalls and monitoring systems to detect and prevent exploitation attempts. Organizations using older versions of SiYuan should conduct immediate vulnerability assessments and implement compensating controls until the official patch can be deployed, ensuring that all system components are properly updated and that access to the affected API endpoint is restricted to authorized users only.