CVE-2025-68856 identifies a DOM-based Cross-site Scripting (XSS) vulnerability in the Mopinion Feedback Form product by keeswolters, affecting all versions up to and including 1.1.1. The vulnerability stems from improper neutralization of user-supplied input during the generation of web pages, specifically within the client-side DOM context. This flaw allows attackers to inject malicious JavaScript code that executes in the victim's browser when interacting with the feedback form. Unlike reflected or stored XSS, DOM-based XSS occurs entirely on the client side, making detection and mitigation more challenging. The vulnerability does not require user authentication, increasing its risk profile. Exploitation could be achieved by tricking users into clicking crafted URLs or submitting manipulated input that the feedback form processes insecurely. The injected scripts could steal session cookies, perform actions on behalf of users, or redirect victims to malicious sites. Although no public exploits are currently known, the vulnerability is publicly disclosed and thus may attract attacker interest. The lack of an official patch at the time of publication necessitates immediate defensive measures. The Mopinion Feedback Form is a web-based tool used for collecting user feedback, commonly integrated into websites across various industries, increasing the potential attack surface. The vulnerability's technical details highlight the need for secure coding practices, including proper input validation, output encoding, and client-side security controls such as Content Security Policy (CSP).

The primary impact of CVE-2025-68856 is on the confidentiality and integrity of user data and sessions. Successful exploitation allows attackers to execute arbitrary JavaScript in the context of the affected website, potentially leading to session hijacking, theft of sensitive information such as credentials or personal data, and unauthorized actions performed on behalf of users. This can erode user trust and damage organizational reputation. Additionally, attackers could use the vulnerability to deliver malware or redirect users to phishing sites, amplifying the threat. While availability impact is less direct, attackers might leverage the vulnerability to disrupt service or degrade user experience. Organizations relying on Mopinion Feedback Form for customer interaction or data collection could face compliance issues if user data is compromised. The vulnerability's client-side nature means that all users interacting with the feedback form are at risk, broadening the scope of affected systems. Without timely mitigation, the risk of targeted or opportunistic attacks increases, especially as the vulnerability becomes more widely known.

1. Monitor the vendor's official channels for patches or updates addressing CVE-2025-68856 and apply them promptly once available. 2. Implement strict input validation on all user-supplied data before processing it in the DOM, ensuring that potentially dangerous characters are sanitized or encoded. 3. Employ robust output encoding techniques, particularly when inserting user input into the DOM, to prevent script execution. 4. Deploy Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts and reduce the impact of potential XSS attacks. 5. Conduct thorough security testing, including automated and manual DOM-based XSS detection, on web applications integrating the Mopinion Feedback Form. 6. Educate developers on secure coding practices related to client-side scripting and DOM manipulation. 7. Consider implementing web application firewalls (WAFs) with rules designed to detect and block XSS attack patterns targeting the feedback form. 8. Review and restrict the use of third-party scripts and plugins that interact with the feedback form to minimize attack vectors. 9. Inform users about the risk and encourage cautious behavior regarding suspicious links or inputs until the vulnerability is fully mitigated.