CVE-2021-24633: Wpdeveloper Countdown Block

Medium severity, CVSS 4.3. EPSS: 0.7% chance of exploitation in the next 30 days.

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.

Affected products

• Wpdeveloper Countdown Block: before 1.1.2 (fixed in 1.1.2)

Published 2021-09-27. Last modified 2026-06-17.