Description
The WHMpress - WHMCS WordPress Integration Plugin plugin for WordPress is vulnerable to Local File Inclusion in all versions up to, and including, 6.3-revision-0 via the whmpress_domain_search_ajax_extended_results() function. This makes it possible for unauthenticated attackers to include and execute arbitrary files on the server, allowing the execution of any PHP code in those files. This can be used to bypass access controls, obtain sensitive data, or achieve code execution in cases where images and other “safe” file types can be uploaded and included. This makes it possible for unauthenticated attackers to update arbitrary options on the WordPress site. Utilizing the /admin/services.php file, this can be leveraged to update the default role for registration to administrator and enable user registration for attackers to gain administrative user access to a vulnerable site.
EPSS Score:
30%
Comprehensive Technical Analysis of EUVD-2024-53966
1. Vulnerability Assessment and Severity Evaluation
The vulnerability identified in the WHMpress - WHMCS WordPress Integration Plugin (EUVD-2024-53966) is a Local File Inclusion (LFI) flaw. This vulnerability allows unauthenticated attackers to include and execute arbitrary files on the server, potentially leading to the execution of any PHP code within those files. The severity of this vulnerability is rated at a base score of 9.8 according to CVSS 3.1, which is considered critical. The vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H indicates that the vulnerability can be exploited remotely (AV:N), requires low complexity (AC:L), does not require any privileges (PR:N) or user interaction (UI:N), and has a high impact on confidentiality, integrity, and availability (C:H/I:H/A:H).
2. Potential Attack Vectors and Exploitation Methods
The primary attack vector involves exploiting the whmpress_domain_search_ajax_extended_results() function to include and execute arbitrary files. Attackers can leverage this vulnerability to:
- Bypass Access Controls: By including files that are not intended to be accessible, attackers can bypass security mechanisms.
- Obtain Sensitive Data: By including configuration files or other sensitive files, attackers can extract valuable information.
- Achieve Code Execution: By including files with malicious PHP code, attackers can execute arbitrary commands on the server.
- Update Arbitrary Options: Attackers can use the
/admin/services.phpfile to update options on the WordPress site, such as changing the default role for registration to administrator and enabling user registration, thereby gaining administrative access.
3. Affected Systems and Software Versions
The vulnerability affects all versions of the WHMpress - WHMCS WordPress Integration Plugin up to and including version 6.3-revision-0. This includes any WordPress site that has this plugin installed and is running a vulnerable version.
4. Recommended Mitigation Strategies
To mitigate this vulnerability, the following steps are recommended:
- Update the Plugin: Immediately update the WHMpress - WHMCS WordPress Integration Plugin to a version higher than 6.3-revision-0, if available.
- Disable the Plugin: If an update is not available, consider disabling the plugin until a patched version is released.
- Implement Access Controls: Restrict access to the
/admin/services.phpfile and other critical files to trusted IP addresses. - Monitor for Suspicious Activity: Implement monitoring and logging to detect any unusual file inclusion attempts or changes to user roles.
- Regular Security Audits: Conduct regular security audits and vulnerability assessments to identify and address similar issues proactively.
5. Impact on European Cybersecurity Landscape
The impact of this vulnerability on the European cybersecurity landscape is significant due to the widespread use of WordPress and its plugins. Organizations and individuals using the WHMpress - WHMCS WordPress Integration Plugin are at risk of data breaches, unauthorized access, and potential takeover of their websites. This can lead to financial losses, reputational damage, and legal consequences under regulations such as GDPR.
6. Technical Details for Security Professionals
Vulnerability Details:
- Function Affected:
whmpress_domain_search_ajax_extended_results() - Exploitation Method: Unauthenticated attackers can craft specific requests to include and execute arbitrary files.
- Impact: Execution of arbitrary PHP code, bypassing access controls, obtaining sensitive data, and updating arbitrary options on the WordPress site.
Detection and Response:
- Detection: Implement file integrity monitoring (FIM) to detect unauthorized changes to critical files. Use web application firewalls (WAF) to monitor and block suspicious requests.
- Response: In case of an incident, isolate the affected system, conduct a thorough investigation, and apply necessary patches. Notify relevant stakeholders and regulatory bodies as required.
References:
By following these recommendations and staying vigilant, organizations can significantly reduce the risk associated with this vulnerability and enhance their overall cybersecurity posture.