What the vulnerability does
01Description
The Call Now Button – The #1 Click to Call Button for WordPress plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the activate function in all versions up to, and including, 1.5.3. This makes it possible for authenticated attackers, with Subscriber-level access and above, to link the plugin to their nowbuttons.com account and add malicious buttons to the site. The vulnerability is only exploitable on fresh installs where the plugin has not been previously configured with an API key.
Explanation of Vulnerability in Simple Terms
02Summary
The Call Now Button plugin for WordPress does not properly check user permissions before allowing certain actions. A logged-in user with low privileges can modify plugin settings or data they should not have access to. This affects all versions up to 1.5.3. Site owners should update to a version newer than 1.5.3 when available.
What an attacker can do
03Attacker Capabilities
A logged-in user can modify plugin settings or data without proper authorization.
Potential impact on your site
04Site Impact
Unauthorized users may alter Call Now Button configuration, potentially disrupting contact functionality or exposing settings.
Conditions required to exploit
05Prerequisites
Attacker must have a low-privilege WordPress user account (e.g., subscriber or contributor).
Key dates
06Disclosure timeline
October 29, 2025
CVE published
April 8, 2026
Record updated
