Zzzcms Cross-Site Scripting Scanner

ZzzCMS is a lightweight ASP.NET content management system used by web developers and content managers for creating and managing digital content. It is often utilized by SMEs and individuals who require a flexible and user-friendly platform for their websites. The system enables users to design and maintain web pages with minimal programming knowledge, making it accessible to non-technical users. ZzzCMS supports various plugins and templates, allowing users to customize their sites extensively. It aims to offer a robust platform with essential web management features, providing support for multimedia, user management, and SEO tools. Its lightweight nature ensures fast performance and minimal server resource consumption.

Cross-Site Scripting (XSS) vulnerabilities occur when an application includes user input in the output returned to the client without proper validation. This vulnerability allows attackers to inject malicious scripts into web pages viewed by other users. XSS can be used to hijack user sessions, deface websites, spread malware, and perform phishing attacks. The injected script is executed on the client-side, enabling attackers to manipulate the content shown to users or steal sensitive information. Detecting and patching XSS vulnerabilities is crucial to maintaining the security of web applications. An exploited XSS vulnerability could significantly harm both a website's integrity and its users' data privacy.

The vulnerability in ZzzCMS can be found in the endpoint handling URLs, specifically in the login.php script. The parameter 'backurl' is vulnerable to malicious script injection through improper input handling. When untrusted data is improperly sanitized, attackers can inject code that executes in the victims’ browsers. This particular vulnerability uses the 'onmouseover' event to trigger an alert box, demonstrating the potential for more harmful attacks. The exploitability of this vulnerability underscores the need for data validation at the server level to mitigate injection attacks. Preventive measures should include encoding outputs used in HTML and using security libraries to sanitize inputs.

Exploiting this vulnerability would allow an attacker to perform actions such as session hijacking and phishing. Users could be tricked into clicking malicious links or injected scripts on the website without their knowledge. Such actions can lead to unauthorized access to sensitive information, potentially compromising user accounts and exposing them to further attacks. Website integrity could be compromised, leading to trust issues between users and the website owners. It could also result in legal liabilities and reputation damage for organizations using the vulnerable software.

REFERENCES

• https://github.com/Ares-X/VulWiki/blob/master/Web%E5%AE%89%E5%85%A8/Zzzcms/Zzzcms%201.75%20xss%E6%BC%8F%E6%B4%9E.md