CVE-2025-62649: RBI Assistant Auth Bypass Vulnerability

CVE-2025-62649 Overview

CVE-2025-62649 affects the Restaurant Brands International (RBI) assistant platform through 2025-09-06. The platform relies on client-side authentication for the submission of equipment orders, allowing unauthenticated network attackers to bypass authorization controls. RBI operates the platform across its restaurant brands, including Burger King, Popeyes, and Tim Hortons. The weakness is classified under [CWE-603] Use of Client-Side Authentication and enables tampering with equipment order submissions.

Critical Impact
Attackers can submit unauthorized equipment orders against the RBI assistant platform without valid credentials by bypassing client-enforced authentication logic.

Affected Products

Restaurant Brands International (RBI) assistant platform through 2025-09-06
Deployments used by Burger King, Popeyes, and Tim Hortons corporate ordering workflows
Web-facing equipment order submission endpoints of the assistant platform

Discovery Timeline

2025-10-17 - CVE-2025-62649 published to the National Vulnerability Database
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-62649

Vulnerability Analysis

The RBI assistant platform enforces authentication and authorization on the client side rather than the server side. When a user submits an equipment order, the browser performs credential checks locally before sending the request to the backend. The backend accepts the resulting request without independently validating the caller's identity or entitlement. An attacker can inspect the JavaScript logic, replay or forge the HTTP request, and submit equipment orders as if they were a legitimate authenticated user.

This weakness maps to [CWE-603] Use of Client-Side Authentication. Because scope is changed (S:C) in the CVSS vector, exploitation impacts components beyond the immediate application, including downstream ordering and fulfillment systems tied to franchise operations.

Root Cause

The root cause is the delegation of trust decisions to code running in the user's browser. Client-side JavaScript determines whether the equipment order submission workflow should proceed, and the server-side API endpoints do not repeat these checks. Any authorization logic executed in an environment the attacker controls can be modified, disabled, or skipped entirely.

Attack Vector

An unauthenticated attacker interacts with the equipment ordering endpoints over the network. Using a browser developer console, an intercepting proxy, or a scripted HTTP client, the attacker crafts a request that mimics a legitimate order submission. Because the server does not validate session tokens, roles, or franchise ownership, the request is accepted. No user interaction is required beyond the attacker's own actions.

The vulnerability was described publicly in the Bobda Hacker Blog Post and covered by Malwarebytes News on Vulnerabilities. No verified exploit code has been published, so the exploitation mechanism is described in prose rather than through synthetic code.

Detection Methods for CVE-2025-62649

Indicators of Compromise

Equipment order submissions from IP addresses not associated with known franchise locations or corporate networks
HTTP requests to order submission endpoints that lack expected session tokens, referrers, or user-agent patterns
Unusual spikes in order volume, duplicate orders, or orders for atypical equipment SKUs
Requests originating outside normal business hours for a given franchise

Detection Strategies

Enable verbose logging on all order submission API endpoints, capturing authentication state, source IP, and request payload metadata
Correlate submitted orders with authenticated user sessions in identity provider logs to flag orphaned submissions
Alert on client-side authorization checks that succeed without a corresponding server-side authentication event

Monitoring Recommendations

Monitor web application firewall (WAF) telemetry for direct API calls that bypass the standard user interface flow
Track franchise-level order baselines and alert on statistical deviations in equipment order frequency or value
Review archived reporting on the incident via the Archived Bobda Hacker Blog to align detection rules with observed attacker behavior

How to Mitigate CVE-2025-62649

Immediate Actions Required

Enforce server-side authentication and authorization on every equipment order submission endpoint, treating client-side checks as UX only
Require valid session tokens and franchise-level entitlement checks before accepting any order payload
Rotate any API keys or shared secrets that were exposed in client-side JavaScript bundles
Review historical order logs since the affected period for unauthorized submissions and reconcile with franchise records

Patch Information

No vendor advisory URL is listed in the enriched CVE data. Coverage of the disclosure is available through the Malwarebytes News on Vulnerabilities and Yahoo News on Burger King Hack reports. Operators of the RBI assistant platform should confirm remediation status directly with the vendor and validate that server-side controls are enforced across all ordering workflows.

Workarounds

Place the equipment ordering application behind an authenticated reverse proxy that enforces identity checks before requests reach the backend
Restrict access to the equipment ordering endpoints to allowlisted franchise IP ranges or VPN-connected users
Disable public exposure of order submission APIs until server-side authentication is confirmed in place

bash

# Example reverse proxy rule requiring authenticated session cookie
# for all requests to the equipment ordering API
location /api/equipment-orders/ {
    if ($cookie_session = "") {
        return 401;
    }
    auth_request /auth/validate;
    proxy_pass https://backend.internal/api/equipment-orders/;
}