What the vulnerability does
01Description
The HotelRunner Booking Widget plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'hotelrunner' shortcode in all versions up to, and including, 5.2.4 due to insufficient input sanitization and output escaping on user supplied attributes. 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
The HotelRunner Booking Widget contains a cross-site scripting (XSS) vulnerability that allows authenticated users to inject malicious scripts. An attacker with low-level access can craft input that executes in other users' browsers, potentially stealing session data or performing actions on their behalf. The vulnerability affects all versions up to 5.2.4.
What an attacker can do
03Attacker Capabilities
Inject malicious scripts that execute in other users' browsers and steal their session data or perform actions on their behalf.
Potential impact on your site
04Site Impact
Authenticated users' accounts and data are at risk; attackers can hijack sessions or modify bookings without victim awareness.
Conditions required to exploit
05Prerequisites
Attacker must have a low-privilege account on the site; no user interaction required from the victim.
Key dates
06Disclosure timeline
November 21, 2025
CVE published
April 8, 2026
Record updated
