WordPress PHPFreeChat Cross-Site Scripting Scanner

WordPress PHPFreeChat is a plugin used by website administrators to integrate chat functionalities into their WordPress sites. It is often employed by community-based websites, forums, and social platforms to enhance user interaction. The plugin allows real-time communication and is favored for its integration capabilities with existing WordPress installations. Website developers and community managers primarily use PHPFreeChat for its ease of implementation and customization features. The plugin supports multiple channels and themes, making it versatile for various types of online communities. Overall, PHPFreeChat is a tool aimed at boosting user engagement through direct chat features on WordPress sites.

The Cross-Site Scripting (XSS) vulnerability detected in WordPress PHPFreeChat allows attackers to inject malicious script into web pages viewed by users. This vulnerability arises from improper validation of user input, specifically the URL parameter. An attacker leveraging this vulnerability can execute arbitrary scripts in the context of the affected site. XSS can lead to significant security risks, including the theft of session cookies and unauthorized operations masquerading as the legitimate user. This vulnerability is critical as it can potentially compromise the security of the entire site and its users. Addressing such vulnerabilities is paramount to maintaining the integrity and trustworthiness of a website.

Technical details regarding the vulnerability highlight a specific endpoint that is vulnerable to script injection, namely the 'css_optimiser.php' endpoint. The vulnerable parameter here is the 'url', which does not adequately sanitize input before processing. This allows attackers to inject JavaScript via specially crafted URLs, leading to execution in the user's browser. The vulnerability is predominantly exploitable when the affected plugin is up and running on a WordPress site, making it a prime target for attackers. Attackers can craft URLs that, when accessed, execute scripts to capture session tokens or perform unauthorized actions. Monitoring and control of input sources and strict validation is essential to prevent such exploits.

The potential effects of exploiting the XSS vulnerability in PHPFreeChat can be severe. They include theft of sensitive user data such as cookies, user information, and session identifiers, leading to unauthorized account access. The execution of arbitrary scripts can deface websites, alter content, or redirect users to malicious or unintended sites. Moreover, it can be the initial vector for more complex attacks like phishing schemes. Persistent XSS attacks can embed malicious code in a site database, affecting multiple users over time. Overall, uncontrolled XSS exposure can severely damage a site's reputation and lead to significant data breaches.

REFERENCES

• https://www.exploit-db.com/exploits/37485
• http://web.archive.org/web/20210120061848/https://www.securityfocus.com/bid/54332/info