CVE-2023-2834 in BookIt Plugin
Summary
by MITRE • 06/30/2023
The BookIt plugin for WordPress is vulnerable to authentication bypass in versions up to, and including, 2.3.7. This is due to insufficient verification on the user being supplied during booking an appointment through the plugin. This makes it possible for unauthenticated attackers to log in as any existing user on the site, such as an administrator, if they have access to the email.
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Analysis
by VulDB Data Team • 07/16/2023
The BookIt plugin for WordPress presents a critical authentication bypass vulnerability affecting versions up to and including 237. This flaw resides in the plugin's insufficient verification mechanisms during the appointment booking process, creating a pathway for unauthenticated attackers to assume the identity of any existing user account on the target WordPress site. The vulnerability specifically exploits the lack of proper authentication checks when processing booking requests, allowing malicious actors to manipulate the system into accepting fabricated user credentials. The attack vector becomes particularly dangerous when attackers possess access to valid email addresses within the target system, as they can leverage this information to target specific user accounts including high-privilege administrators. This vulnerability fundamentally undermines the security model of the WordPress platform by enabling unauthorized access to user accounts without proper authentication mechanisms. The issue manifests when the plugin fails to validate the authenticity of user information provided during appointment booking, creating a persistent security gap that can be exploited repeatedly. This type of vulnerability falls under the category of weak authentication controls and insufficient input validation, both of which are commonly referenced in security frameworks and attack methodologies.
The technical implementation of this vulnerability stems from the plugin's failure to properly validate user credentials during the booking process. When users attempt to book appointments through the BookIt plugin, the system should verify that the provided user information corresponds to legitimate account credentials before granting access or creating bookings. However, the current implementation lacks adequate checks to ensure that the user attempting to book an appointment actually possesses valid authentication credentials for the target account. This weakness creates a scenario where attackers can manipulate the booking process by providing any valid email address associated with an existing user account, effectively allowing them to impersonate that user. The vulnerability operates at the application layer, specifically within the authentication and authorization mechanisms of the plugin's booking functionality. The lack of proper session management and user validation during the booking workflow means that the system accepts potentially fraudulent user information without sufficient verification steps.
The operational impact of this vulnerability extends far beyond simple unauthorized access, as it provides attackers with the potential to escalate privileges and compromise entire WordPress installations. When an attacker successfully exploits this vulnerability, they can gain access to administrative accounts, potentially leading to complete system compromise, data exfiltration, and the ability to modify or delete critical website content. The vulnerability is particularly concerning because it requires minimal prerequisites for exploitation - essentially just access to valid email addresses within the target system. This makes it an attractive target for automated attacks and mass exploitation campaigns. The authentication bypass allows attackers to perform actions that would normally require legitimate user credentials, including modifying booking configurations, accessing sensitive user data, and potentially using the compromised accounts for further attacks within the WordPress ecosystem. The impact is compounded by the fact that many WordPress sites may not have robust monitoring or alerting mechanisms in place to detect unauthorized access attempts, making the exploitation of this vulnerability particularly stealthy.
Mitigation strategies for this vulnerability should focus on immediate remediation through plugin updates to versions that address the authentication bypass issue. System administrators should also implement additional security controls including rate limiting on booking requests, enhanced monitoring of authentication-related activities, and the implementation of multi-factor authentication for high-privilege accounts. Network-level controls such as web application firewalls can help detect and block malicious booking requests, while regular security audits should verify that user accounts are properly configured with strong authentication mechanisms. The vulnerability's characteristics align with common attack patterns documented in the attack mitigation frameworks, particularly those addressing authentication bypass techniques and privilege escalation methods. Organizations should also consider implementing principle of least privilege access controls and regular security assessments to identify and remediate similar vulnerabilities in other plugins or components of their WordPress installations. The issue demonstrates the critical importance of proper input validation and authentication verification in web applications, as highlighted in various security standards and best practices including those referenced in the common weakness enumeration and attack technique classifications.