CVE-2021-42078: Improper Neutralization of Input During Web Page Generation

PHP Event Calendar through 2021-11-04 allows persistent cross-site scripting XSS, as demonstrated by the /server/ajax/eventsmanager.php title parameter. This can be exploited by an adversary in multiple ways, e.g., to perform actions on the page in the context of other users, or to deface the sit...