CVE-2025-41085 is a stored Cross-Site Scripting (XSS) vulnerability classified under CWE-79 affecting Apidog Web Platform version 2.7.15. The vulnerability occurs because the platform does not properly sanitize SVG image files uploaded via the '/api/v1/user-avatar' endpoint. Attackers can craft malicious SVG files containing embedded JavaScript code, which when uploaded, are stored on the server without adequate neutralization of harmful input. When other users access resources referencing these SVG avatars, the malicious scripts execute in their browsers within the security context of the vulnerable web application. This can lead to theft of session tokens, unauthorized actions on behalf of users, or further compromise of user accounts. The attack vector requires an authenticated user to send a POST request with a malicious SVG payload, and some user interaction is necessary to trigger the script execution. The vulnerability has a CVSS 4.0 base score of 5.1, reflecting medium severity due to network attack vector, low attack complexity, no privileges required beyond user authentication, and user interaction needed. No known public exploits or patches are currently available. The vulnerability is particularly concerning for environments where user avatars are publicly accessible or where multiple users interact with the platform, increasing the attack surface. The lack of proper SVG sanitization is a common vector for XSS attacks, as SVG files can embed scripts and event handlers. This vulnerability highlights the importance of rigorous input validation and output encoding in web applications handling user-generated content.

For European organizations, exploitation of this vulnerability could lead to unauthorized access to user sessions, data theft, and potential lateral movement within affected systems. Organizations relying on Apidog Web Platform for internal or customer-facing applications may face reputational damage, regulatory scrutiny under GDPR if personal data is compromised, and operational disruptions. The stored XSS nature means that once a malicious SVG is uploaded, any user accessing the affected resource is at risk, potentially amplifying the impact in environments with many users. Attackers could leverage this to conduct phishing, spread malware, or escalate privileges. The medium severity score reflects moderate risk, but the real-world impact depends on the deployment context, user base size, and exposure of the vulnerable endpoint. European sectors with high regulatory requirements, such as finance, healthcare, and government, could face significant compliance and legal consequences if exploited. Additionally, the vulnerability could be used as an initial foothold in multi-stage attacks targeting European enterprises using the platform.

European organizations should implement strict input validation and sanitization for all SVG uploads, ideally disallowing SVG files if not strictly necessary. Employ server-side SVG sanitization libraries that remove scripts and event handlers before storing or serving SVG content. Restrict the '/api/v1/user-avatar' endpoint to accept only safe image formats such as PNG or JPEG where possible. Implement Content Security Policy (CSP) headers to limit script execution from untrusted sources. Monitor logs and network traffic for unusual POST requests to the avatar upload endpoint and for anomalous user behavior. Enforce strong authentication and session management to reduce the impact of potential session hijacking. Conduct regular security assessments and penetration testing focusing on file upload functionalities. Stay alert for official patches or updates from Apidog and apply them promptly once available. Consider isolating or sandboxing user-uploaded content to minimize script execution risks. Educate users about the risks of interacting with suspicious content and maintain incident response plans tailored to XSS attacks.