WordPress Plugin My Calendar is prone to a cross-site scripting vulnerability because it fails to properly sanitize user-supplied input. An attacker may leverage this issue to execute arbitrary script code in the browser of an unsuspecting user in the context of the affected site. This can allow the attacker to steal cookie-based authentication credentials and launch other attacks. WordPress Plugin My Calendar version 2.3.28 is vulnerable; prior versions may also be affected.
Update to plugin version 2.3.29 or latest
WordPress Plugin Video Player for YouTube Cross-Site Scripting (1.3)
Joomla! Core 1.5.x Cross-Site Scripting (1.5.0 - 1.5.9)
Drupal Core 8.x.x Cross-Site Request Forgery (8.0.0 - 8.7.14)
WordPress Plugin BulletProof Security Multiple Cross-Site Scripting Vulnerabilities (.53.2)