CVE-2022-4940 Scanner

The WCFM Membership plugin for WordPress is widely used by website administrators to manage memberships within WooCommerce environments. Developed by WCLovers, this plugin facilitates the creation and management of membership plans, allowing users to sign up and access restricted content or features on a WooCommerce-based site. The plugin is popular for its integration capabilities with other WooCommerce extensions, providing flexibility and control over membership processes. However, it's crucial for administrators to keep their plugins updated to maintain security. The vulnerability scanner evaluates versions of the plugin up to 2.10.0, helping to identify any instances of unsecured administrative actions. This scanning tool is essential for site owners aiming to secure their membership management processes against unauthorized access.

The broken access control vulnerability in WCFM Membership is a significant security issue found in versions up to 2.10.0. This vulnerability arises from missing capability checks on certain AJAX actions, leaving the plugin susceptible to unauthorized data manipulation. Malicious users can exploit this flaw to alter membership details, approve or deny memberships, and modify renewal information without authentication. These unauthorized actions can lead to data tampering and the compromise of membership data integrity. The scanner identifies this vulnerability, ensuring site administrators are alerted to the presence of potentially insecure versions of the WCFM Membership plugin. Addressing this vulnerability can prevent unauthorized access and preserve the intended user permissions.

Technical details of the vulnerability highlight the absence of capability checks in AJAX actions like wcfm-memberships, wcfm-memberships-manage, and wcfm-memberships-settings. This oversight in security checks allows unauthenticated attackers to send payloads that modify sensitive membership data. By intercepting HTTP requests within the admin-ajax.php script, attackers can bypass normal access control mechanisms. Specifically, the exploit can be conducted by capturing and using a nonce value, circumventing typical authentication processes. The vulnerability scanner verifies the presence of this issue by checking HTTP response bodies for indicators like "recordsTotal", "recordsFiltered", and "draw", ensuring comprehensive detection of the access control weakness. The scanner's identification of these patterns confirms the vulnerability, prompting necessary updates from site administrators.

When exploited, the broken access control vulnerability can result in several adverse effects on the affected websites. Unauthorized users can manipulate membership data, which might lead to financial losses and reputational damage due to altered membership statuses and unauthorized access to restricted content. Furthermore, consistent exploitation can cause administrative confusion, complicating membership management and disrupting the site's overall operation. The site might experience a breach in data privacy, as attackers gain access to personal and sensitive information associated with memberships. This exploitation might also expose the site to further attacks targeting other weaknesses. Ensuring the integrity of administrative functions by patching the vulnerability is crucial to maintaining site security.

REFERENCES

• https://www.wordfence.com/threat-intel/vulnerabilities/wordpress-plugins/wc-multivendor-membership/wcfm-membership-2100-missing-authorization
• https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=2633191%40wc-multivendor-membership&new=2633191%40wc-multivendor-membership&sfp_email=&sfph_mail=
• https://wpscan.com/vulnerability/41bdf07c-d707-436b-8cfc-5ef852f0b7f5/