CVE-2025-58661 is a medium-severity vulnerability classified under CWE-79, which corresponds to Improper Neutralization of Input During Web Page Generation, commonly known as Cross-site Scripting (XSS). This specific vulnerability affects the eZee Technosys eZee Online Hotel Booking Engine, versions up to 1.0.0. The vulnerability allows for Stored XSS attacks, where malicious scripts injected by an attacker are permanently stored on the target server, such as in a database, and then served to users when they access the affected web pages. The CVSS v3.1 base score is 5.9, indicating a medium level of severity. The vector string (CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L) reveals that the attack can be executed remotely over the network (AV:N) with low attack complexity (AC:L), but requires high privileges (PR:H) and user interaction (UI:R). The scope is changed (S:C), meaning the vulnerability affects resources beyond the initially vulnerable component. The impact affects confidentiality, integrity, and availability at a low level. Stored XSS vulnerabilities can be exploited to execute arbitrary JavaScript in the context of users' browsers, potentially leading to session hijacking, defacement, or redirection to malicious sites. Given that this vulnerability is in an online hotel booking engine, attackers could target hotel staff or customers interacting with the booking system, potentially stealing sensitive information or manipulating booking data. No known exploits are reported in the wild yet, and no patches have been linked at the time of publication. The vulnerability was reserved on 2025-09-03 and published on 2025-09-22.

For European organizations, especially those in the hospitality sector using the eZee Online Hotel Booking Engine, this vulnerability poses a significant risk. Exploitation could lead to unauthorized disclosure of customer data, including personal and payment information, undermining GDPR compliance and resulting in regulatory penalties. The integrity of booking data could be compromised, leading to fraudulent bookings or cancellations, damaging business operations and reputation. Availability impacts, while low, could disrupt booking services temporarily, affecting customer experience and revenue. Since the vulnerability requires high privileges and user interaction, internal staff or privileged users might be targeted via social engineering or phishing to trigger the exploit. This elevates insider threat risks and necessitates strict access controls and user awareness. The cross-site scripting nature also means that customers accessing the booking platform could be exposed to malicious scripts, potentially leading to credential theft or malware infections. Given the interconnectedness of European hospitality networks and the importance of tourism, such disruptions could have broader economic implications.

Organizations should prioritize the following mitigations: 1) Apply vendor patches immediately once available; since no patches are currently linked, maintain close monitoring of vendor advisories. 2) Implement strict input validation and output encoding on all user-supplied data within the booking engine to neutralize malicious scripts. 3) Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in browsers. 4) Enforce the principle of least privilege for all users, minimizing high privilege accounts and monitoring their activities closely. 5) Conduct regular security awareness training for staff to recognize phishing and social engineering attempts that could facilitate exploitation. 6) Use Web Application Firewalls (WAFs) with rules tailored to detect and block XSS payloads targeting the booking engine. 7) Perform regular security assessments and penetration testing focused on XSS vulnerabilities. 8) Monitor logs for unusual activities indicative of attempted exploitation. 9) For customer-facing interfaces, consider implementing multi-factor authentication to reduce the impact of credential theft. These measures, combined, will reduce the likelihood and impact of exploitation beyond generic advice.