Description
WordPress Plugin Countdown and CountUp, WooCommerce Sales Timer is prone to a cross-site request forgery vulnerability. Exploiting this issue may allow a remote attacker to perform certain administrative actions and gain unauthorized access to the affected application; other attacks are also possible. WordPress Plugin Countdown and CountUp, WooCommerce Sales Timer version 1.5.7 is vulnerable; prior versions may also be affected.
Remediation
Update to plugin version 1.5.8 or latest
References
https://www.wordfence.com/vulnerability-advisories/#CVE-2021-34636
https://plugins.svn.wordpress.org/countdown-wpdevart-extended/trunk/readme.txt
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