CVE-2026-39784: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in nicdark Hotel Booking

This vulnerability (CVE-2026-39784) is classified as CWE-79, indicating improper neutralization of input during web page generation, leading to Cross-Site Scripting (XSS). It affects nicdark Hotel Booking software versions up to 3.8. The flaw allows unauthenticated attackers to inject malicious scripts, potentially impacting confidentiality, integrity, and availability of the affected system. The CVSS 3.1 base score is 7.1, reflecting network attack vector, low attack complexity, no privileges required, user interaction required, and scope changed with low impact on confidentiality, integrity, and availability.

Successful exploitation can lead to execution of arbitrary scripts in the context of the affected web application, potentially allowing attackers to steal user data, hijack user sessions, or perform actions on behalf of users. The vulnerability impacts confidentiality, integrity, and availability at a low level but can facilitate further attacks.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no patch or official fix information is provided, users should monitor vendor communications for updates. In the meantime, consider applying web application firewall (WAF) rules to detect and block XSS payloads and restrict user input where possible.