CVE-2023-5561 Scanner

WordPress Core is a widely used content management system that powers millions of websites globally. It is predominantly utilized by bloggers, businesses, and web developers for its user-friendly interface and customizability. WordPress allows users to manage website content with ease, offering a variety of plugins and themes to enhance functionality and design. Although it is primarily used for publishing and managing web content, it is also employed by developers to create more complex web applications. This extensive usage underscores the importance of identifying security vulnerabilities within WordPress Core to prevent potential exploits. The availability of a scanner for detecting specific vulnerabilities helps maintain the robustness and security of WordPress-driven websites.

The Information Disclosure vulnerability in WordPress Core, as identified in this scanner, highlights a significant security concern. It affects WordPress versions 4.7.0 through 6.3.1, where sensitive user information, particularly email addresses, could be exposed. This vulnerability occurs via the User REST endpoint, which allows attackers to brute force or verify user email addresses. Given the widespread use of WordPress, unauthorized disclosure of sensitive information poses substantial privacy and security risks. Addressing this vulnerability is crucial for protecting user confidentiality and maintaining trust in WordPress-based platforms.

Technical details of the Information Disclosure vulnerability involve the inadequacies in the implementation of the User REST endpoint. The vulnerability allows unauthorized individuals to exploit the parameter supporting search functions, potentially accessing the user email column. While the system restricts displaying email addresses to users without 'list_users' capability, the vulnerability can be manipulated to circumvent this control, leading to inadvertent disclosure. The scanner works by identifying the affected endpoints through crafted GET requests, observing responses that denote successful exploitation attempts. Its practical application involves leveraging these insights to fortify affected systems and preempt unauthorized data access.

Exploiting this Information Disclosure vulnerability can have severe repercussions for WordPress website administrators and users. Unauthorized access to user email addresses can lead to targeted phishing attacks, dissemination of spam, and other malicious activities aimed at deceiving affected users. Additionally, compromised email addresses can be used to facilitate further attacks, such as password resets and compromised account access. The breach of confidential information erodes user trust and may result in reputational harm and potential legal liabilities for website operators. Therefore, addressing this vulnerability is vital to protect the integrity of WordPress sites and safeguard user data.

REFERENCES

• https://www.wordfence.com/threat-intel/vulnerabilities/wordpress-core/wordpress-core-470-631-sensitive-information-exposure-via-user-search-rest-endpoint?asset_slug=wordpress
• https://wpscan.com/vulnerability/19380917-4c27-4095-abf1-eba6f913b441/
• https://nvd.nist.gov/vuln/detail/CVE-2023-5561