A Server-Side Request Forgery (SSRF) vulnerability in the custom process creation feature of linqi allows an authenticated attacker to probe internal network components. By crafting a specific process containing an HTTP Request component, an attacker can force the server to send arbitrary HTTP requests. By observing the varying application responses (Success, Failed, or 504 Gateway Time-out), the attacker can determine the status of internal ports, leading to internal network reconnaissance.

An Improper Authentication vulnerability in the /api/Cdn/GetFile endpoint of linqi allows unauthenticated, remote attackers to bypass file access controls. The ValidateAnonFileAccess function incorrectly grants access if an 'AnonFile' query parameter containing exactly 256 characters is provided. While this flaw allows bypassing the intended authorization check, the actual security impact is negligible; the exposed resources are strictly limited to minified JavaScript and CSS files that contain no sensitive data and are already publicly accessible via a standard CDN.

The linqi application contains hardcoded cryptographic keys. Additionally, the application uses a weak algorithm with a limited ASCII charset to dynamically generate Initialization Vectors (IVs) for AES/CBC encryption, making known-plaintext attacks feasible. An attacker with local access can leverage these vulnerabilities to decrypt sensitive obfuscated strings, including ConnectionString values containing database credentials from appsettings.json.

An issue was discovered in linqi before 1.4.0.1 on Windows. There is /api/Cdn/GetFile local file inclusion.

An issue was discovered in linqi before 1.4.0.1 on Windows. There is an NTLM hash leak via the /api/Cdn/GetFile and /api/DocumentTemplate/{GUID] endpoints.

An issue was discovered in linqi before 1.4.0.1 on Windows. There is /api/DocumentTemplate/{GUID] XSS.

An issue was discovered in linqi before 1.4.0.1 on Windows. There is SSRF via Document template generation; i.e., via remote images in process creation, file inclusion, and PDF document generation via malicious JavaScript.

An issue was discovered in linqi before 1.4.0.1 on Windows. There is LDAP injection.

An issue was discovered in linqi before 1.4.0.1 on Windows. There is a hardcoded password salt.