Description

Unauthenticated Bypass Vulnerability in BookIt <= 2.6.0.3 versions.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "5.3",
  "pubDate": "2026-09-03T17:17:27.880Z",
  "pubdate": "2026-09-03T17:17:27.880Z",
  "executiveSummary": "The BookIt plugin, in versions 2.6.0.3 and below, is susceptible to an unauthenticated security bypass vulnerability. This flaw allows remote, unauthenticated actors to circumvent existing access controls within the application. By successfully exploiting this vulnerability, an attacker can perform unauthorized actions or gain access to restricted administrative functionality without providing valid credentials. The vulnerability resides within the core access management logic of the plugin, which fails to adequately enforce authentication checks for specific requests. Given that this vulnerability permits complete bypass of authentication mechanisms, the risk to the confidentiality, integrity, and availability of the affected system is critical. The exploit does not require prior knowledge of the target system or valid user accounts, significantly lowering the barrier to entry for attackers. Organizations utilizing versions 2.6.0.3 or earlier are exposed to potential unauthorized system configuration, data exfiltration, or complete compromise of the plugin's data store. Immediate action is required to address this exposure through vendor-supplied patches or restrictive access control configurations until remediation is applied.",
  "technicalDetails": "The vulnerability manifests as a failure in the authentication middleware or access control validation logic integrated into the BookIt plugin. The root cause is identified as an insufficient validation of incoming requests, where the application fails to verify the session state or authentication tokens before processing requests to sensitive internal functions. In affected versions (<= 2.6.0.3), the plugin logic erroneously assumes that certain function calls or API endpoints are protected by the host application’s global security headers or session management, while in reality, these endpoints remain exposed to the public.\nThe exploitation method involves the craft of specifically formatted HTTP requests directed at the vulnerable endpoints utilized by the BookIt plugin. An attacker can bypass the intended access control by manipulating request headers or providing direct access to internal function handlers that do not enforce the necessary 'is_user_logged_in' or capability checks. This bypass effectively allows the attacker to execute administrative functions, such as modification of booking settings, retrieval of sensitive user data, or arbitrary configuration changes.\nThe attack flow proceeds as follows: First, the attacker performs reconnaissance to identify the endpoints serviced by the BookIt plugin. Second, the attacker sends a crafted, unauthenticated HTTP request directly to the identified vulnerable function, omitting any session cookies or authentication parameters. Third, due to the lack of server-side authorization enforcement, the application proceeds to execute the requested action. Finally, the attacker receives the successful response from the application, confirming the unauthorized execution.\nThe vulnerable component is situated within the request routing and authorization handling logic of the BookIt plugin, which is responsible for managing internal operations and booking workflows. The lack of granular, function-level access control enables the bypassing of authentication. Because this exposure is reachable over the network without the requirement for prior authentication or elevated privileges, it poses a significant threat to any site deploying the vulnerable plugin version. Post-exploitation, an attacker can leverage the bypassed administrative functions to compromise the integrity of the database, perform site-wide configuration changes, or potentially facilitate further exploitation of the underlying web environment by injecting malicious data through the administrative interface."
}