Cross-Site Request Forgery (CSRF) vulnerability via IMG element in Tiki before 16.3, 17.x before 17.1, 12 LTS before 12.12 LTS, and 15 LTS before 15.5 LTS allows an authenticated user to gain administrator privileges if an administrator opens a wiki page with an IMG element, related to tiki-assignuser.php.

Cross-Site Request Forgery (CSRF) vulnerability via IMG element in Tiki before 16.3, 17.x before 17.1, 12 LTS before 12.12 LTS, and 15 LTS before 15.5 LTS allows an authenticated user to edit global permissions if an administrator opens a wiki page with an IMG element, related to tiki-objectpermissions.php. For example, an attacker could assign administrator privileges to every unauthenticated user of the site.

TikiFilter.php in Tiki Wiki CMS Groupware 12.x through 16.x does not properly validate the imgsize or lang parameter to prevent XSS.

A vulnerability in Tiki Wiki CMS 15.2 could allow a remote attacker to read arbitrary files on a targeted system via a crafted pathname in a banner URL field.

Some forms with the parameter geo_zoomlevel_to_found_location in Tiki Wiki CMS 12.x before 12.10 LTS, 15.x before 15.3 LTS, and 16.x before 16.1 don't have the input sanitized, related to tiki-setup.php and article_image.php. The impact is XSS.