The Read More & Accordion plugin for WordPress is vulnerable to unauthorized modification and loss of data due to a missing capability check on the expmDeleteData() function in all versions up to, and including, 3.4.2. This makes it possible for authenticated attackers, with Subscriber-level access and above, to delete arbitrary 'read more' posts.
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 Read More & Accordion WordPress plugin before 3.2.7 unserializes user input provided via the settings, which could allow high-privilege users such as admin to perform PHP Object Injection when a suitable gadget is present.
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Adam Skaat Countdown & Clock (WordPress plugin) countdown-builder allows Stored XSS.This issue affects Countdown & Clock (WordPress plugin): from n/a through 2.3.2.
The Countdown, Coming Soon, Maintenance WordPress plugin before 2.2.9 does not sanitize and escape the post parameter before outputting it back in an admin page, leading to a Reflected Cross-Site Scripting.