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.
Severity
CVSS 3.0
6.1 medium
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS
1.1% chance of exploitation in the next 30 days; higher than 66% of CVEs (scores of 2026-10-31)