CVE-2026-81769 in Booking Hub Plugin
Summary
by MITRE • 09/02/2026
Incorrect Privilege Assignment vulnerability in LiquidThemes Booking Hub allows Privilege Escalation.
This issue affects Booking Hub: from n/a through 1.3.1.
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Analysis
by VulDB Data Team • 09/02/2026
The identified security flaw within the LiquidThemes Booking Hub plugin represents a critical failure in access control mechanisms, specifically categorized under CWE-269 Improper Privilege Assignment. This vulnerability arises when the application fails to properly verify that an authenticated user possesses the necessary administrative privileges before executing sensitive operations or accessing restricted data structures. In the context of WordPress-based booking systems, such flaws typically manifest through insufficient checks on function calls that modify database records, update settings, or manage other users' accounts. Because the plugin processes requests from logged-in users without adequately validating their role level against the required permission capabilities, an attacker with a low-privilege account can manipulate HTTP parameters to escalate their rights to those of an administrator. This bypasses the intended security model where only designated site administrators should have control over booking configurations and user management features.
The operational impact of this privilege escalation is severe, as it grants unauthorized actors full administrative access to the underlying WordPress installation. Once elevated privileges are obtained, the attacker can exploit the platform's extensive plugin ecosystem to execute arbitrary code, deface websites, or install malicious backdoors that persist across updates. Furthermore, the attacker gains unrestricted read and write access to the database containing sensitive customer information, including names, contact details, payment history, and booking schedules. This exposure violates core principles of confidentiality and integrity defined in industry standards such as OWASP Top 10, particularly regarding broken access control and security misconfiguration. The ability to alter system settings also allows for persistent persistence mechanisms, enabling long-term unauthorized access even if initial entry points are patched or closed by the victim organization.
Mitigation strategies must address both immediate remediation and long-term architectural improvements. The primary defense is to update the LiquidThemes Booking Hub plugin to version 1.3.2 or later, where the developers have implemented proper capability checks using WordPress functions like current_user_can() before processing administrative actions. For organizations unable to patch immediately due to compatibility constraints, temporary mitigations include restricting access to the wp-admin directory via IP whitelisting and enforcing strong password policies combined with multi-factor authentication for all administrator accounts. Additionally, implementing a Web Application Firewall can help detect and block anomalous request patterns associated with privilege escalation attempts, such as unexpected parameter modifications in AJAX calls or form submissions that target administrative endpoints. Regular security audits focusing on input validation and authorization logic are essential to prevent similar flaws from being introduced during future development cycles.