The Popup Box – Create Countdown, Coupon, Video, Contact Form Popups plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the deactivate_plugin_option() function in all versions up to, and including, 4.9.7. This makes it possible for unauthenticated attackers to update the 'ays_pb_upgrade_plugin' option with arbitrary data.

The Countdown Timer block – Display the event's date into a timer. plugin for WordPress is vulnerable to Information Exposure in all versions up to, and including, 1.2.4 via the [ctb] shortcode due to insufficient restrictions on which posts can be included. This makes it possible for authenticated attackers, with Contributor-level access and above, to extract data from password protected, private, or draft posts that they should not have access to.

The T(-) Countdown plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'tminus' shortcode in all versions up to, and including, 2.4.8 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.

The HurryTimer – An Scarcity and Urgency Countdown Timer for WordPress & WooCommerce plugin for WordPress is vulnerable to unauthorized post publication due to a missing capability check on the activateCampaign() function in all versions up to, and including, 2.10.0. This makes it possible for authenticated attackers, with contributor-level access and above, to publish arbitrary posts like ones they have submitted for review, or a site administrator has in draft.

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in twinpictures, baden03 jQuery T(-) Countdown Widget allows Stored XSS.This issue affects jQuery T(-) Countdown Widget: from n/a through 2.3.25.

The CSSable Countdown WordPress plugin through 1.5 does not sanitise and escape some of its settings, which could allow high privilege users such as admin to perform Stored Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed (for example in multisite setup)

The Countdown, Coming Soon, Maintenance – Countdown & Clock plugin for WordPress is vulnerable to unauthorized access due to a missing capability check on the conditionsRow and switchCountdown functions in all versions up to, and including, 2.7.8. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject PHP Objects and modify the status of countdowns.

The jQuery T(-) Countdown Widget plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's tminus shortcode in all versions up to, and including, 2.3.25 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.

Cross-Site Request Forgery (CSRF) vulnerability in WPAssist.Me WordPress Countdown Widget allows Cross-Site Scripting (XSS).This issue affects WordPress Countdown Widget: from n/a through 3.1.9.1.

The NextMove Lite – Thank You Page for WooCommerce and Finale Lite – Sales Countdown Timer & Discount for WooCommerce plugins for WordPress are vulnerable to unauthorized access of data due to a missing capability check on the download_tools_settings() function in all versions up to, and including, 2.17.0. This makes it possible for unauthenticated attackers to export system information that can aid attackers in an attack.