The Countdown Block WordPress plugin before 1.1.2 does not have authorisation in the eb_write_block_css AJAX action, which allows any authenticated user, such as Subscriber, to modify post contents displayed to users.

The Countdown and CountUp, WooCommerce Sales Timers WordPress plugin is vulnerable to Cross-Site Request Forgery via the save_theme function found in the ~/includes/admin/coundown_theme_page.php file due to a missing nonce check which allows attackers to inject arbitrary web scripts, in versions up to and including 1.5.7.

The uji-countdown plugin before 2.0.7 for WordPress has XSS.

Cross-site scripting (XSS) vulnerability in the jQuery Countdown module 7.x-1.x before 7.x-1.1 for Drupal allows remote authenticated users with the "access administration pages" permission to inject arbitrary web script or HTML via unspecified vectors.

Unrestricted file upload vulnerability in process.php in Tizag Countdown Creator 3 allows remote attackers to execute arbitrary code by uploading a file with an executable extension via index.php, then accessing the uploaded file via a direct request to the file in pics/. NOTE: some of these details are obtained from third party information.

SQL injection vulnerability in countdown.php in LI-Scripts LI-Countdown allows remote attackers to execute arbitrary SQL commands via the years parameter.