The Event Registration Calendar By vcita plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's shortcodes in all versions up to, and including, 1.4.0 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Missing Authorization vulnerability in CodePeople CP Multi View Event Calendar allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects CP Multi View Event Calendar : from n/a through 1.4.13.

The Sugar Calendar – Simple Event Management plugin for WordPress is vulnerable to Reflected Cross-Site Scripting due to the use of add_query_arg & remove_query_arg without appropriate escaping on the URL in all versions up to, and including, 3.3.0. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.

The Freemius SDK, as used by hundreds of WordPress plugin and theme developers, was vulnerable to Cross-Site Request Forgery and Information disclosure due to missing capability checks and nonce protection on the _get_debug_log, _get_db_option, and the _set_db_option functions in versions up to, and including 2.4.2. Any WordPress plugin or theme running a version of Freemius less than 2.4.3 is vulnerable.

Missing Authorization vulnerability in CodePeople CP Multi View Event Calendar allows Functionality Misuse.This issue affects CP Multi View Event Calendar: from n/a through 1.4.10.

The WP Event Manager – Events Calendar, Registrations, Sell Tickets with WooCommerce plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the plugin parameter in all versions up to, and including, 3.1.41 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.

User enumeration is found in PHPJabbers Event Booking Calendar v4.0. This issue occurs during password recovery, where a difference in messages could allow an attacker to determine if the user is valid or not, enabling a brute force attack with valid users.

A vulnerability classified as problematic has been found in GZ Scripts Event Booking Calendar 1.8. Affected is an unknown function of the file /load.php. The manipulation of the argument first_name/second_name/phone/address_1/country leads to cross site scripting. It is possible to launch the attack remotely. The identifier of this vulnerability is VDB-233352. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.

Several WordPress plugins developed by Cool Plugins are vulnerable to arbitrary plugin installation and activation that can lead to remote code execution by authenticated attackers with minimal permissions, such as a subscriber.

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 Cross-Site Request Forgery. This is due to missing nonce validation in the ls_parse_vcita_callback() function. This makes it possible for unauthenticated attackers to modify the plugin's settings and inject malicious JavaScript via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.