The Event Registration Calendar By vcita plugin, versions up to and including 3.9.1, and Online Payments – Get Paid with PayPal, Square & Stripe plugin, for WordPress are vulnerable to Stored Cross-Site Scripting via the 'email' parameter in versions up to, and including, 1.3.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers with the edit_posts capability, such as contributors and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Auth. (admin+) Stored Cross-Site Scripting (XSS) vulnerability in CoreFortress Easy Event calendar plugin <= 1.0 versions.

A vulnerability, which was classified as critical, was found in Calendar Event Management System 2.3.0. This affects an unknown part. The manipulation of the argument start/end leads to sql injection. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. The identifier VDB-220197 was assigned to this vulnerability.

A vulnerability was found in Calendar Event Management System 2.3.0. It has been rated as critical. This issue affects some unknown processing of the component Login Page. The manipulation of the argument name/pwd leads to sql injection. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used. The associated identifier of this vulnerability is VDB-220175.

Authenticated (subscriber+) Reflected Cross-Site Scripting (XSS) vulnerability in Totalsoft Event Calendar – Calendar plugin <= 1.4.6 at WordPress.

Unauthenticated Event Deletion vulnerability in Totalsoft Event Calendar – Calendar plugin <= 1.4.6 at WordPress.

The Calendar Event Multi View WordPress plugin before 1.4.07 does not have any authorisation and CSRF checks in place when creating an event, and is also lacking sanitisation as well as escaping in some of the event fields. This could allow unauthenticated attackers to create arbitrary events and put Cross-Site Scripting payloads in it.

PHP Event Calendar through 2021-11-04 allows persistent cross-site scripting (XSS), as demonstrated by the /server/ajax/events_manager.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 site.

PHP Event Calendar before 2021-09-03 allows SQL injection, as demonstrated by the /server/ajax/user_manager.php username parameter. This can be used to execute SQL statements directly on the database, allowing an adversary in some cases to completely compromise the database system. It can also be used to bypass the login form.

The Calendar Event Multi View WordPress plugin before 1.4.01 does not sanitise or escape the 'start' and 'end' GET parameters before outputting them in the page (via php/edit.php), leading to a reflected Cross-Site Scripting issue.