A path traversal vulnerability in SiYuan allows an authenticated user to read sensitive files from the server, posing a significant risk to data confidentiality.

This vulnerability is a path traversal flaw (CWE-22/CWE-23) that allows an authenticated attacker to escape the application's root directory. The attack is performed over the network and requires the attacker to have an existing user account.

With a CVSS score of 7.7, this vulnerability represents a high risk to data confidentiality. An attacker could exploit this flaw to read arbitrary files on the server, potentially exposing configuration files, credentials, or sensitive user data, leading to a total breach of the application's security posture.

Immediate Action: Upgrade the SiYuan installation to version 3.7.1 or later to resolve the path traversal flaw.

Proactive Monitoring: Review application access logs for attempts to use directory traversal sequences (e.g., "../") in requests.

Compensating Controls: Implement strict file system permissions for the user running the SiYuan service to ensure the application cannot access files outside of its designated data directory.

Public Exploit Available: false

Organizations utilizing SiYuan must prioritize upgrading to version 3.7.1. Given the risk of unauthorized file access, failing to patch this vulnerability leaves the environment exposed to credential theft and sensitive data exfiltration by authenticated users.