WordPress New User Approve Cross-Site Scripting Scanner

The WordPress New User Approve plugin is a popular tool amongst WordPress website administrators, designed to manage new user registrations effectively. It allows for manual approval of users before they can access the content and features of websites, which can be useful for membership sites or blogs ensuring that only verified users gain access. Businesses, personal blogs, and membership sites utilize this plugin to enhance control over user access and maintain the quality of user engagement. It's essential for site administrators looking to maintain a secure environment by filtering incoming user registrations. The plugin facilitates an organized approval workflow, making the job easier for teams managing larger communities. It can be integrated seamlessly into any WordPress site, complementing existing security measures.

Cross-Site Scripting (XSS) is a vulnerability that occurs when a web application includes user-supplied data in web pages without proper validation. In the case of WordPress New User Approve, this vulnerability allows attackers to inject malicious scripts into webpages viewed by other users. Such scripts can steal sensitive information such as user credentials or session cookies. This vulnerability requires an attacker to trick users into activating these scripts through crafted URLs or forms. XSS vulnerabilities can lead to severe security breaches, as they enable attackers to execute scripts in the context of a legitimate user. It primarily affects the integrity and confidentiality of user interactions on compromised applications.

The vulnerability in the WordPress New User Approve plugin lies in the manner URLs are not properly escaped before being outputted in the context of website attributes. Specifically, the issue occurs because the plugin fails to sanitize inputs within certain parameters properly. This oversight allows attackers to append malicious scripts in URLs, leading to reflected XSS attacks. The vulnerable endpoint appears to be on the wp-admin page, which should be adequately maintained for security purposes. Attackers can exploit this by sending URLs containing scripts, which execute within the user's browser upon accessing such links. Thus, proper input validation and output escaping are essential to mitigate this exposure.

When the Cross-Site Scripting vulnerability in WordPress New User Approve is exploited, attackers can execute arbitrary scripts in the browser of users visiting affected pages. This may result in data theft, such as exfiltration of session cookies leading to account hijacking. Furthermore, attackers could deface web pages, promote phishing attacks, or propagate malware. Any action performed by the user in a compromised session could potentially be captured and misused by attackers. The impact may extend to system-wide vulnerabilities if administrators' credentials are compromised, jeopardizing overall site security. Therefore, it poses a significant risk requiring immediate attention to prevent exploitation.

REFERENCES

• https://wpscan.com/vulnerability/17f99601-f5c9-4300-9b4a-6d75fa7ab94a
• https://wordpress.org/plugins/new-user-approve