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 stems from insufficient input validation and sanitization of SVG image uploads submitted via the '/api/v1/user-avatar' POST endpoint. Attackers can craft malicious SVG files containing embedded JavaScript payloads that are stored on the server without proper neutralization. When any user accesses the affected resource that renders the SVG, the embedded script executes in the victim's browser context. This can lead to unauthorized actions such as session hijacking, cookie theft, or execution of arbitrary scripts within the user's session. The vulnerability is remotely exploitable without authentication, requiring only that an attacker upload a malicious SVG and that a victim subsequently accesses the compromised content. The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N) indicates network attack vector, low attack complexity, no privileges required but some user interaction is needed to trigger the payload. The scope is limited to the Apidog Web Platform 2.7.15 version, with no known public exploits or patches currently available. The vulnerability was reserved in April 2025 and published in February 2026 by INCIBE, a reputable European cybersecurity entity. The lack of proper SVG sanitization highlights a common web security weakness where image files can carry executable code, emphasizing the need for robust input validation and output encoding in web applications handling user-generated content.

For European organizations using Apidog Web Platform 2.7.15, this vulnerability poses a significant risk to the confidentiality and integrity of user sessions and data. Successful exploitation could allow attackers to execute arbitrary scripts in users' browsers, leading to session hijacking, credential theft, or unauthorized actions performed on behalf of users. This can result in data breaches, loss of user trust, and potential regulatory penalties under GDPR if personal data is compromised. The medium CVSS score reflects moderate impact; however, the ease of exploitation without authentication and the potential for widespread user impact elevate the concern. Organizations relying on Apidog for API management or web platform services may face reputational damage and operational disruption if attackers leverage this flaw to propagate malware or conduct phishing campaigns. The vulnerability's presence in a European vendor's product also raises concerns about supply chain security and the need for vigilant patch management.

Immediate mitigation should focus on restricting SVG uploads or disabling the feature until a vendor patch is available. Implement strict server-side validation and sanitization of SVG files to remove any embedded scripts or potentially dangerous elements. Employ Content Security Policy (CSP) headers to limit script execution contexts and reduce the impact of any injected scripts. Monitor and audit user-uploaded content for suspicious payloads. Educate users about the risks of interacting with untrusted content and encourage cautious behavior. Network-level controls such as Web Application Firewalls (WAFs) can be configured to detect and block malicious SVG payloads targeting the '/api/v1/user-avatar' endpoint. Organizations should engage with Apidog for timely updates and patches and plan for rapid deployment once available. Additionally, conduct security testing and code reviews focused on input handling and output encoding to prevent similar vulnerabilities in other components.