TestLink through 1.9.20 allows type juggling for authentication bypass because === is not used.

TestLink v1.9.20 was discovered to contain a Cross-Site Request Forgery (CSRF) via /lib/plan/planView.php.

TestLink v1.9.20 was discovered to contain a stored cross-site scripting (XSS) vulnerability via /lib/inventory/inventoryView.php.

TestLink 1.9.20 Raijin was discovered to contain a broken access control vulnerability at /lib/attachments/attachmentdownload.php

TestLink v1.9.20 was discovered to contain a SQL injection vulnerability via /lib/execute/execNavigator.php.

In TestLink 1.9.20, the lib/cfields/cfieldsExport.php goback_url parameter causes a security risk because it depends on client input and is not constrained to lib/cfields/cfieldsView.php at the web site associated with the session.

In TestLink 1.9.20, a crafted login.php viewer parameter exposes cleartext credentials.

An unrestricted file upload vulnerability in keywordsImport.php in TestLink 1.9.20 allows remote attackers to execute arbitrary code by uploading a file with an executable extension. This allows an authenticated attacker to upload a malicious file (containing PHP code to execute operating system commands) to a publicly accessible directory of the application.

A SQL injection vulnerability in TestLink 1.9.20 allows attackers to execute arbitrary SQL commands in planUrgency.php via the urgency parameter.

A SQL injection vulnerability in TestLink 1.9.20 allows attackers to execute arbitrary SQL commands in dragdroptreenodes.php via the node_id parameter.