CVE-2026-13381 in Clinic
Summary
by MITRE • 07/21/2026
VSee Clinic 7.1.26 and API 1.3.0 contain an Insecure Direct Object Reference (IDOR) vulnerability in the /v1.3.0/api/files endpoint. An authenticated attacker can manipulate the 'remark' request parameter to enumerate, retrieve, and delete files belonging to other users on the application server.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 07/21/2026
The vulnerability exists within VSee Clinic version 7.1.26 and its associated API version 1.3.0 where an insecure direct object reference flaw has been identified in the /v1.3.0/api/files endpoint. This represents a critical security weakness that stems from inadequate access control mechanisms within the application's file management system. The flaw allows authenticated attackers to exploit the 'remark' parameter in HTTP requests to gain unauthorized access to sensitive data belonging to other users.
The technical implementation of this vulnerability demonstrates poor input validation and insufficient authorization checks within the application's backend processing logic. When an attacker manipulates the 'remark' parameter, the system fails to properly verify whether the requesting user has legitimate authorization to access the targeted file resources. This oversight creates a direct pathway for privilege escalation through object reference manipulation, where the application directly uses user-supplied input to construct file paths or identifiers without proper validation against the authenticated user's permissions.
The operational impact of this vulnerability extends beyond simple data exposure to encompass full unauthorized file manipulation capabilities including enumeration, retrieval, and deletion operations. Attackers can systematically browse through file structures to identify valuable resources belonging to other users, extract sensitive information, and potentially cause data loss or corruption by deleting critical files. This vulnerability particularly affects healthcare environments where patient records and medical data are stored, creating significant compliance risks under regulations such as hipaa.
The vulnerability aligns with CWE-639 which specifically addresses insecure direct object references in web applications, representing a well-documented weakness that has been consistently exploited across various platforms. From an adversary perspective, this flaw maps directly to ATT&CK technique T1078 which covers valid accounts and privilege escalation through unauthorized access to resources. The vulnerability's exploitation requires only basic authentication credentials and parameter manipulation, making it particularly dangerous as it can be leveraged by attackers with minimal technical sophistication.
Mitigation strategies should focus on implementing robust access control mechanisms including proper input validation and user context verification before processing file operations. The application must enforce strict authorization checks that verify each request against the authenticated user's permissions and implement proper object-level access controls to prevent cross-user resource access. Additionally, organizations should conduct regular security assessments of their web applications, implement proper logging and monitoring for suspicious file access patterns, and ensure all third-party components are regularly updated to address known vulnerabilities. The implementation of principle of least privilege access controls and comprehensive audit trails will significantly reduce the attack surface and provide better incident response capabilities should such vulnerabilities be exploited.