Tiki 17.1 does not validate user input for special characters; consequently, a CSV Injection attack can open a CMD.EXE or Calculator window on the victim machine to perform malicious activity, as demonstrated by an "=cmd|' /C calc'!A0" payload during User Creation.

Tiki 17.1 allows upload of a .PNG file that actually has SVG content, leading to XSS.

A Reflected Cross-Site Scripting (XSS) vulnerability exists in the POST request data zipPath of tiki-adminsystem.php in Tiki version 21.2. This vulnerability allows attackers to execute arbitrary JavaScript code via a crafted payload, leading to potential access to sensitive information or unauthorized actions.

A Cross-Site Scripting (XSS) vulnerability exists in the page parameter of tiki-editpage.php in Tiki version 26.3 and earlier. This vulnerability allows attackers to execute arbitrary JavaScript code via a crafted payload, leading to potential access to sensitive information or unauthorized actions.