Cross-site scripting (XSS) vulnerability in Craig Knudsen WebCalendar before 1.2.5, 1.2.6, and other versions before 1.2.7 allows remote attackers to inject arbitrary web script or HTML via the Category Name field to category.php.
install/index.php in Craig Knudsen WebCalendar before 1.2.5 allows remote attackers to modify settings.php and possibly execute arbitrary code via vectors related to the user theme preference.