What the vulnerability does
01Description
The LatePoint – Calendar Booking Plugin for Appointments and Events plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'button_caption' parameter in the [latepoint_resources] shortcode in versions up to and including 5.3.0. This is due to insufficient output escaping when the 'items' parameter is set to 'bundles'. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Explanation of Vulnerability in Simple Terms
02Summary
LatePoint versions up to 5.3.0 contain a cross-site scripting (XSS) vulnerability that allows authenticated users to inject malicious scripts. The vulnerability has a changed scope, meaning injected code can affect other users and site functionality beyond the plugin itself. An attacker with low-level access can execute JavaScript in other users' browsers without requiring them to click a link.
What an attacker can do
03Attacker Capabilities
Inject JavaScript that runs in other users' browsers, potentially stealing session tokens or modifying page content.
Potential impact on your site
04Site Impact
Authenticated users with low privileges can compromise other users' sessions or deface site content visible to them.
Conditions required to exploit
05Prerequisites
Attacker must have a low-privilege account (e.g., customer or subscriber role) on the site.
Key dates
06Disclosure timeline
April 8, 2026
CVE published
April 8, 2026
Record updated
