CVE-2025-62649 identifies a vulnerability in the Restaurant Brands International (RBI) assistant platform, which is used for submitting equipment orders. The core issue is the reliance on client-side authentication mechanisms, classified under CWE-603 (Use of Client-Side Authentication). In this scenario, authentication and authorization checks are performed on the client side (e.g., in the browser or client application), rather than on the server. This architectural flaw allows attackers to bypass authentication by manipulating client-side controls or requests, as client-side enforcement can be easily altered or circumvented. The vulnerability affects all versions up to the reported date (through 2025-09-06). The CVSS v3.1 base score is 5.8 (medium severity), with vector AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N, indicating network attack vector, low attack complexity, no privileges or user interaction required, and a scope change. The impact is limited to integrity, as attackers can submit unauthorized or fraudulent equipment orders, potentially causing operational disruptions or financial losses. Confidentiality and availability are not impacted. No patches or fixes are currently listed, and no known exploits have been reported in the wild. The vulnerability highlights the critical importance of server-side authentication and validation in preventing unauthorized actions in web platforms.

For European organizations using the RBI assistant platform, this vulnerability poses a risk of unauthorized submission of equipment orders, which could lead to financial fraud, supply chain disruptions, or operational inefficiencies. While confidentiality and availability are not directly affected, the integrity compromise could result in incorrect or malicious orders being processed, impacting business operations and vendor relationships. Organizations may face increased costs or delays if fraudulent orders are fulfilled or if additional verification steps are required. The risk is heightened for large-scale restaurant chains or franchises operating across Europe that rely on this platform for procurement. Additionally, reputational damage could occur if customers or partners perceive weak security controls. The lack of required privileges or user interaction means attackers can remotely exploit this vulnerability without insider access, increasing the threat surface.

To mitigate CVE-2025-62649, RBI must redesign the assistant platform to enforce all authentication and authorization checks on the server side, ensuring that client-side controls cannot be bypassed. Specific recommendations include: 1) Implement robust server-side validation for all order submissions, rejecting any requests that do not meet authentication requirements. 2) Use secure session management and token-based authentication mechanisms that cannot be manipulated client-side. 3) Employ rate limiting and anomaly detection on order submission endpoints to identify and block suspicious activity. 4) Conduct thorough security testing, including penetration testing and code reviews, focusing on authentication flows. 5) Provide timely patches and updates to affected customers and communicate the importance of applying them promptly. 6) For organizations using the platform, implement additional monitoring of order logs and establish manual verification processes for unusual orders until the vulnerability is remediated. 7) Educate staff on recognizing potential fraudulent orders and reporting suspicious activities.