CVE-2025-10552 is a stored Cross-site Scripting (XSS) vulnerability classified under CWE-79, affecting the 3DSwymer component of Dassault Systèmes' 3DEXPERIENCE platform, specifically Release 3DEXPERIENCE R2025x Golden. Stored XSS vulnerabilities occur when malicious input is permanently stored on the target server and later rendered in users' browsers without proper sanitization or encoding. In this case, the vulnerability allows an attacker with at least limited privileges (as indicated by the CVSS vector requiring privileges and user interaction) to inject arbitrary JavaScript code into web pages generated by 3DSwymer. When other users access these pages, the malicious script executes in their browser context, potentially stealing session cookies, performing actions on behalf of the user, or exfiltrating sensitive data. The CVSS score of 8.7 (high severity) reflects the network attack vector, low attack complexity, required privileges, and user interaction, with a scope change and high impact on confidentiality and integrity but no impact on availability. Although no exploits are currently known in the wild, the vulnerability's nature and the criticality of the affected platform make it a significant risk. 3DEXPERIENCE is widely used in industries such as aerospace, automotive, and manufacturing for collaborative product lifecycle management, making the confidentiality and integrity of data paramount. The lack of available patches at the time of publication necessitates immediate mitigation efforts by affected organizations. Technical mitigation should focus on input validation, output encoding, and deploying Content Security Policies to restrict script execution. Monitoring and incident response readiness are also important to detect and respond to potential exploitation attempts.

For European organizations, the impact of CVE-2025-10552 is considerable due to the widespread use of Dassault Systèmes' 3DEXPERIENCE platform in key industrial sectors such as aerospace, automotive, and manufacturing. Successful exploitation can lead to session hijacking, unauthorized actions performed on behalf of legitimate users, and exfiltration of sensitive intellectual property or business data. This can result in operational disruptions, loss of competitive advantage, regulatory non-compliance (especially under GDPR due to data confidentiality breaches), and reputational damage. The vulnerability's ability to affect multiple users through stored XSS increases the attack surface within collaborative environments. European companies that rely heavily on 3DSwymer for internal and external collaboration are at risk of widespread compromise if the vulnerability is exploited. Additionally, the cross-site scripting flaw can be leveraged as a pivot point for further attacks within the corporate network, potentially leading to broader compromise. The high CVSS score underscores the criticality of the threat, and the lack of known exploits in the wild should not lead to complacency given the ease of exploitation and potential impact.

1. Apply official patches or updates from Dassault Systèmes as soon as they become available to remediate the vulnerability at the source. 2. Until patches are released, implement strict input validation and output encoding on all user-supplied content within 3DSwymer to prevent malicious script injection. 3. Deploy a robust Content Security Policy (CSP) that restricts the execution of inline scripts and limits sources of executable scripts to trusted domains. 4. Enforce least privilege access controls to minimize the number of users who can input data that will be rendered in other users' browsers. 5. Conduct regular security audits and code reviews focusing on input handling in 3DSwymer customizations or integrations. 6. Monitor web application logs and user activity for unusual behavior indicative of attempted exploitation, such as unexpected script execution or anomalous requests. 7. Educate users about the risks of clicking on suspicious links or interacting with untrusted content within the platform. 8. Consider deploying web application firewalls (WAFs) with rules tailored to detect and block XSS payloads targeting 3DSwymer. 9. Review and tighten session management controls to reduce the impact of session hijacking if exploitation occurs. 10. Coordinate with Dassault Systèmes support and threat intelligence communities for updates and shared mitigation strategies.