CVE-2025-62920 identifies a stored Cross-site Scripting (XSS) vulnerability in the webnique USERCENTRICS Consent Management Platform (CMP), specifically affecting versions up to 1.0.9. This vulnerability stems from improper neutralization of user-supplied input during the generation of web pages, which allows malicious scripts to be stored and later executed in the context of users’ browsers. Stored XSS is particularly dangerous because injected scripts persist on the server and can affect multiple users. The CVSS 3.1 base score is 5.4 (medium), with an attack vector of network (remote exploitation), low attack complexity, requiring privileges (PR:L) and user interaction (UI:R). The scope is changed (S:C), indicating that exploitation can affect resources beyond the vulnerable component. The impact affects confidentiality and integrity partially but does not impact availability. The vulnerability requires an attacker to have some level of authenticated access to inject the payload and relies on victims interacting with the malicious content, such as clicking a link or loading a compromised page. No known exploits in the wild have been reported yet, and no patches are currently linked, indicating that organizations should prioritize monitoring and mitigation. The USERCENTRICS CMP is widely used in Europe for managing user consent under GDPR, making this vulnerability relevant for organizations handling personal data and requiring compliant consent management solutions.

For European organizations, the impact of CVE-2025-62920 can be significant due to the widespread use of USERCENTRICS CMP in managing user consent under GDPR. Exploitation could allow attackers to execute malicious scripts in the browsers of users or administrators, potentially leading to theft of sensitive information such as session tokens, personal data, or manipulation of consent records. This undermines user trust and may result in regulatory non-compliance penalties. The partial compromise of confidentiality and integrity could facilitate further attacks, including privilege escalation or lateral movement within affected systems. However, the requirement for authenticated access and user interaction limits the scale and ease of exploitation. Organizations with high volumes of web traffic and multiple administrators or users interacting with the CMP are at greater risk. The vulnerability could also be leveraged in targeted attacks against organizations with sensitive data processed through the CMP, especially those in regulated sectors like finance, healthcare, and government services within Europe.

Organizations should implement a multi-layered mitigation strategy beyond generic advice: 1) Monitor vendor communications closely for official patches or updates addressing CVE-2025-62920 and apply them promptly. 2) Until patches are available, restrict access to the CMP interface to trusted users and enforce strong authentication mechanisms to reduce the risk of unauthorized input injection. 3) Implement rigorous input validation and output encoding on all user-supplied data fields within the CMP to prevent script injection. 4) Employ Content Security Policy (CSP) headers to limit the execution of unauthorized scripts in browsers. 5) Conduct regular security audits and penetration testing focused on web application vulnerabilities, including stored XSS, especially on consent management platforms. 6) Educate administrators and users about the risks of interacting with suspicious links or content related to the CMP. 7) Monitor logs and user activity for anomalous behavior indicative of exploitation attempts. 8) Consider deploying Web Application Firewalls (WAFs) with rules tuned to detect and block XSS payloads targeting the CMP. These steps collectively reduce the attack surface and help mitigate the risk until a vendor patch is released.