CVE-2025-47489 is a Stored Cross-Site Scripting (XSS) vulnerability classified under CWE-79, affecting the Beds24 Online Booking system developed by markkinchin. This vulnerability arises from improper neutralization of input during web page generation, allowing malicious scripts to be stored and subsequently executed in the context of users' browsers when they access affected pages. The vulnerability affects versions up to 2.0.29 of Beds24 Online Booking. The CVSS 3.1 base score is 6.5, indicating a medium severity level. The vector string (AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L) reveals that the attack can be performed remotely over the network with low attack complexity, requires low privileges (authenticated user), and user interaction is necessary (e.g., a victim must visit a maliciously crafted page). The vulnerability impacts confidentiality, integrity, and availability to a limited extent, as the attacker can execute arbitrary scripts in the victim’s browser, potentially stealing session tokens, manipulating displayed content, or performing actions on behalf of the user. The scope is changed (S:C), meaning the vulnerability affects components beyond the initially vulnerable component, possibly impacting other users or systems. No known exploits are currently reported in the wild, and no patches have been linked yet. The vulnerability is significant because Beds24 Online Booking is a widely used platform for managing hotel and accommodation bookings, and exploitation could lead to session hijacking, defacement, or unauthorized actions within the booking system.

For European organizations, especially those in the hospitality and travel sectors using Beds24 Online Booking, this vulnerability poses a risk of client-side attacks that could compromise user data and trust. Attackers exploiting this vulnerability could steal sensitive customer information, including personal details and booking information, or perform unauthorized actions such as modifying bookings or injecting fraudulent content. This could lead to reputational damage, regulatory non-compliance (e.g., GDPR violations due to data leakage), and financial losses. Since the vulnerability requires authenticated access and user interaction, insider threats or social engineering could facilitate exploitation. The cross-site scripting flaw could also be leveraged as a pivot point for more complex attacks, including phishing campaigns targeting customers or employees. Given the interconnected nature of booking platforms and payment systems, the impact could extend beyond the immediate application, affecting broader IT infrastructure and customer trust across European hospitality businesses.

To mitigate this vulnerability, European organizations using Beds24 Online Booking should: 1) Immediately check for and apply any official patches or updates released by markkinchin addressing CVE-2025-47489. 2) Implement strict input validation and output encoding on all user-supplied data fields within the booking platform to prevent injection of malicious scripts. 3) Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in browsers. 4) Conduct regular security assessments and penetration testing focused on web application vulnerabilities, particularly XSS. 5) Educate users and administrators about the risks of phishing and social engineering that could facilitate exploitation. 6) Monitor logs and user activities for unusual behavior indicative of exploitation attempts. 7) Consider deploying web application firewalls (WAF) with rules tailored to detect and block XSS payloads targeting Beds24 Online Booking. 8) Isolate the booking system network segment to limit lateral movement in case of compromise. These measures, combined with timely patching, will reduce the risk and potential impact of exploitation.