tiki/tiki-upload_file.php in Tiki 18.4 allows remote attackers to upload JavaScript code that is executed upon visiting a tiki/tiki-download_file.php?display&fileId= URI.
Stored XSS vulnerabilities in Tiki before 18.2, 15.7 and 12.14 allow an authenticated user injecting JavaScript to gain administrator privileges if an administrator opens a wiki page and moves the mouse pointer over a modified link or thumb image.
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.