CVE-2026-11392 in WP Hotel Booking Plugin
Summary
by MITRE • 07/10/2026
The WP Hotel Booking plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'check_in_date' and 'check_out_date' parameters in all versions up to, and including, 2.3.1 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.
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Analysis
by VulDB Data Team • 07/10/2026
The WP Hotel Booking plugin for WordPress represents a significant security vulnerability through its susceptibility to reflected cross-site scripting attacks affecting versions up to and including 2.3.1. This flaw resides within the plugin's handling of date parameters, specifically the 'check_in_date' and 'check_out_date' fields that are processed through user input without adequate sanitization measures. The vulnerability stems from insufficient validation and proper output escaping mechanisms that fail to neutralize malicious script content before it gets rendered in web pages.
The technical implementation of this vulnerability allows attackers to inject malicious scripts into the plugin's date parameter handling functionality, creating a reflected XSS vector that can execute within the context of a victim's browser session. When users navigate to affected pages containing these unvalidated parameters, any injected scripts are executed immediately upon page rendering, potentially allowing attackers to steal session cookies, deface websites, or redirect users to malicious domains. The vulnerability affects all users regardless of authentication status, making it particularly dangerous as it requires no privileged access to exploit.
This weakness creates operational risks that extend beyond simple script injection, potentially enabling more sophisticated attacks such as credential theft, session hijacking, or data exfiltration from authenticated users who visit compromised pages. The reflected nature of the vulnerability means that malicious payloads are delivered via URL parameters, making exploitation straightforward through social engineering techniques where attackers craft malicious links designed to trick users into clicking them. The impact is amplified by the widespread use of WordPress plugins and the fact that many website administrators may not regularly update their plugin versions.
Security practitioners should recognize this vulnerability as a direct violation of established secure coding practices outlined in CWE-79, which specifically addresses cross-site scripting flaws in software applications. The vulnerability also aligns with ATT&CK technique T1566, which describes social engineering tactics used to deliver malicious payloads through crafted web content. Organizations using this plugin should immediately implement mitigations including input validation on all user-supplied parameters, proper output encoding for HTML contexts, and comprehensive testing of all parameter handling functions. Additionally, regular security updates and patch management processes must be prioritized to prevent exploitation of known vulnerabilities in commonly used WordPress plugins.
The root cause of this vulnerability demonstrates poor input validation practices that should be addressed through comprehensive secure coding training for developers and implementation of automated security scanning tools during the development lifecycle. Organizations should also consider implementing web application firewalls to detect and block malicious parameter injection attempts while maintaining proper monitoring of website traffic for signs of exploitation attempts. Regular security assessments of third-party plugins and themes remain essential for maintaining overall web application security posture, particularly given the prevalence of vulnerabilities in popular WordPress ecosystem components that serve as attack vectors for broader network compromises.