CVE-2025-62649 identifies a security vulnerability in the Restaurant Brands International (RBI) assistant platform, specifically related to its reliance on client-side authentication for the submission of equipment orders. Client-side authentication means that the platform trusts authentication decisions made on the user's device or browser, rather than verifying credentials or authorization on the server side. This approach is inherently insecure because it can be manipulated by attackers to bypass authentication controls. The vulnerability is classified under CWE-603 (Use of Client-Side Authentication), which highlights the risk of relying on client-side mechanisms for security-critical decisions. According to the CVSS v3.1 vector, the attack vector is network-based (AV:N), with low attack complexity (AC:L), no privileges required (PR:N), and no user interaction needed (UI:N). The scope is changed (S:C), indicating that exploitation affects resources beyond the vulnerable component. The impact is limited to integrity (I:L), meaning attackers can alter order submissions but cannot access confidential data or disrupt availability. The vulnerability affects all versions of the assistant platform up to the publication date and has no known exploits in the wild. The lack of server-side authentication allows an attacker to craft and submit unauthorized equipment orders, potentially causing operational and financial consequences for affected organizations. The absence of patches or mitigation links suggests that RBI needs to address this issue promptly by redesigning the authentication mechanism to enforce server-side validation and authorization checks.

For European organizations using RBI’s assistant platform, this vulnerability poses a risk to the integrity of equipment order submissions. Unauthorized actors could manipulate or submit fraudulent orders, leading to operational disruptions, inventory mismanagement, or financial losses due to incorrect or malicious orders. While confidentiality and availability are not directly impacted, the integrity compromise could undermine trust in the ordering process and cause logistical challenges. In the context of supply chain and restaurant operations, such disruptions may affect service delivery and customer satisfaction. Additionally, if attackers leverage this vulnerability as part of a broader attack chain, it could facilitate further compromise or fraud. The medium severity rating reflects the moderate but tangible risk to business operations. Organizations relying heavily on automated or digital order submissions through the RBI platform should prioritize addressing this vulnerability to maintain operational integrity.

1. RBI should immediately transition from client-side to robust server-side authentication and authorization mechanisms for all order submission processes. 2. Implement strict server-side validation of all incoming requests to ensure only authenticated and authorized users can submit or modify equipment orders. 3. Employ multi-factor authentication (MFA) for users accessing the assistant platform to reduce the risk of unauthorized access. 4. Monitor and log all order submission activities with anomaly detection to identify suspicious or unauthorized transactions promptly. 5. Conduct regular security assessments and penetration testing focused on authentication and input validation controls. 6. Educate internal users and partners about the risks of client-side authentication and encourage vigilance against suspicious order activities. 7. If possible, temporarily restrict order submission capabilities to trusted networks or IP ranges until a secure authentication model is implemented. 8. Coordinate with RBI for timely patch releases and updates addressing this vulnerability. 9. Review and update incident response plans to include scenarios involving fraudulent order submissions.