Services/Form/classes/class.ilDateDurationInputGUI.php and Services/Form/classes/class.ilDateTimeInputGUI.php in ILIAS 5.1.x through 5.3.x before 5.3.4 allow XSS via an invalid date.

Services/COPage/classes/class.ilPCSourceCode.php in ILIAS 5.1.x, 5.2.x, and 5.3.x before 5.3.5 has XSS.

Services/Feeds/classes/class.ilExternalFeedItem.php in ILIAS 5.1.x, 5.2.x, and 5.3.x before 5.3.5 has XSS via a link attribute.

The RSS subsystem in ILIAS 5.1.x, 5.2.x, and 5.3.x before 5.3.5 has XSS via a URI to Services/Feeds/classes/class.ilExternalFeedItem.php.

ILIAS 5.1.x, 5.2.x, and 5.3.x before 5.3.5 redirects a logged-in user to a third-party site via the return_to_url parameter.

ILIAS 5.3.4 has XSS through unsanitized output of PHP_SELF, related to shib_logout.php and third-party demo files.

ILIAS before 5.2.4 has XSS via the cmd parameter to the displayHeader function in setup/classes/class.ilSetupGUI.php in the Setup component.

Stored XSS vulnerability in the Media Objects component of ILIAS before 5.1.21 and 5.2.x before 5.2.9 allows an authenticated user to inject JavaScript to gain administrator privileges, related to the setParameter function in Services/MediaObjects/classes/class.ilMediaItem.php.

ILIAS before 5.2.3 has XSS via SVG documents.

Multiple cross-site scripting (XSS) vulnerabilities in ilias.php in ILIAS 4.4.1 allow remote authenticated users to inject arbitrary web script or HTML via the (1) tar, (2) tar_val, or (3) title parameter.