CVE-2026-84767 in BookIt Plugin
Summary
by MITRE • 09/03/2026
Unauthenticated Bypass Vulnerability in BookIt <= 2.6.0.3 versions.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 09/03/2026
The vulnerability identified within BookIt versions prior to or equal to 2.6.0.3 represents a critical security flaw classified as an unauthenticated access bypass, which fundamentally undermines the integrity of the application's authentication mechanisms. This type of defect typically arises from improper implementation of session management, flawed logic in route handling, or insufficient validation of user credentials before granting access to protected resources. In the context of web applications like BookIt, such a flaw allows remote attackers to interact with administrative functions, view sensitive booking data, or modify system configurations without possessing valid login credentials. The absence of required authentication checks at critical endpoints creates an open door for malicious actors to exploit the application's core functionality from a distance, bypassing traditional perimeter defenses that rely on identity verification.
From a technical perspective, this vulnerability aligns with CWE-287, which describes Improper Authentication, and often overlaps with CWE-306, Missing Authentication for Critical Function. The root cause likely involves server-side logic that fails to enforce security constraints consistently across all API endpoints or web pages. For instance, the application may rely on client-side checks rather than server-side validation, allowing attackers to manipulate HTTP requests directly using tools like curl or Burp Suite to access restricted areas. Alternatively, there may be a misconfiguration in the web server's routing table that exposes internal management interfaces without requiring token-based verification. This lack of rigorous identity proofing enables unauthorized entities to assume administrative privileges effectively, leading to a complete compromise of the application's security posture.
The operational impact of this vulnerability is severe and multifaceted. Attackers can exploit this flaw to exfiltrate personally identifiable information (PII) associated with users who have made bookings through the platform, including names, contact details, and potentially payment information if stored insecurely. Beyond data theft, an attacker could manipulate booking records, cancel reservations for legitimate customers, or create fraudulent entries that disrupt business operations. In a worst-case scenario, full administrative access allows for persistent backdoors to be installed, leading to long-term compromise of the underlying infrastructure. This not only results in direct financial loss and reputational damage but also violates regulatory compliance requirements such as GDPR or HIPAA if sensitive health-related booking data is involved, exposing the organization to significant legal liabilities.
To mitigate this risk, immediate action must focus on upgrading BookIt to a version later than 2.6.0.3 where these authentication checks have been properly implemented and tested by the vendor. Until an upgrade is feasible, administrators should implement compensating controls such as IP whitelisting for administrative interfaces if they are exposed to the internet, although this is not a substitute for proper authentication. It is also advisable to deploy Web Application Firewalls (WAFs) configured with rules that detect and block common exploitation patterns associated with unauthenticated access attempts. Furthermore, organizations should conduct a thorough audit of their application's security configuration to ensure no other endpoints suffer from similar oversights. Regular penetration testing focused on authentication bypass techniques will help identify any residual weaknesses in the defense-in-depth strategy employed by the organization.