CVE-2025-62651: RBI Assistant Auth Bypass Vulnerability

CVE-2025-62651 Overview

CVE-2025-62651 affects the Restaurant Brands International (RBI) assistant platform through 2025-09-06. The platform does not implement access control for the bathroom rating interface, allowing unauthenticated network attackers to interact with functionality that should be restricted to authorized users. The flaw is categorized as an authorization weakness [CWE-863] and enables integrity impact against a system component beyond the vulnerable application's scope. RBI operates franchises including Burger King, Popeyes, and Tim Hortons, and the assistant platform supports restaurant operations.

Critical Impact
Unauthenticated attackers over the network can submit or manipulate bathroom rating data through the RBI assistant platform, affecting data integrity across a broader restaurant operations scope.

Affected Products

Restaurant Brands International (RBI) assistant platform through 2025-09-06
Franchise-facing interfaces tied to the RBI assistant platform (Burger King, Popeyes, Tim Hortons operations)
Bathroom rating interface component of the RBI assistant platform

Discovery Timeline

2025-10-17 - CVE-2025-62651 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-62651

Vulnerability Analysis

The RBI assistant platform exposes a bathroom rating interface without enforcing access control checks. Any network-based caller can reach the endpoint and submit interactions without presenting valid credentials or session context. Because the platform serves multiple restaurant brands under the RBI umbrella, unauthorized submissions can influence operational data used by franchise locations. The scope change reflected in the CVSS vector indicates that the affected component impacts resources beyond its own security boundary.

Root Cause

The root cause is missing authorization enforcement on the bathroom rating interface [CWE-863]. The platform accepts requests without validating whether the caller possesses the required role, tenant context, or authentication token. Authorization logic is either absent or bypassable, allowing anonymous callers to invoke functionality intended for authenticated restaurant staff.

Attack Vector

An attacker sends HTTP requests to the exposed bathroom rating endpoint over the network. No authentication, user interaction, or elevated privileges are required. The attacker can submit arbitrary rating data, potentially at scale, distorting operational metrics tied to restaurant hygiene reporting. Public write-ups by the reporting researcher describe direct interaction with the endpoint using standard web requests. Technical details are available in the BobdaHacker Blog Post and the Malwarebytes Vulnerability Report.

Detection Methods for CVE-2025-62651

Indicators of Compromise

Unauthenticated HTTP requests to bathroom rating endpoints on the RBI assistant platform originating from unexpected IP ranges or user agents
Anomalous volumes of rating submissions inconsistent with normal franchise operational patterns
Requests lacking valid session cookies, JWTs, or API keys on interfaces that should require them

Detection Strategies

Review application access logs for requests to the bathroom rating interface that return successful status codes without an authenticated principal
Baseline legitimate submission rates per franchise location and alert on statistical outliers
Correlate source IP addresses with known corporate and franchise network ranges to surface external submissions

Monitoring Recommendations

Enable verbose logging on the assistant platform's API gateway with capture of authentication decisions and request principals
Forward application and gateway logs to a centralized SIEM for retention and correlation with other web-tier events
Alert on any endpoint returning HTTP 200 responses when the authentication middleware reports no authenticated user

How to Mitigate CVE-2025-62651

Immediate Actions Required

Restrict network access to the bathroom rating interface at the reverse proxy or web application firewall until authorization logic is deployed
Add server-side authorization checks that validate authenticated identity and franchise-level tenancy before accepting rating submissions
Rate-limit the endpoint per source IP and per account to reduce abuse potential
Audit historical submissions on the endpoint to identify and purge unauthorized entries

Patch Information

No vendor advisory URLs are listed in the CVE record. Restaurant Brands International has not published a formal security advisory referenced in NVD. Operators of the assistant platform should contact the vendor directly for remediation status and confirm that the bathroom rating interface enforces authentication and authorization checks. Reference reporting is available in the Yahoo News Article.

Workarounds

Place the bathroom rating interface behind an authenticated reverse proxy that requires valid session tokens before forwarding requests
Temporarily disable the endpoint if it is not business-critical while authorization controls are implemented
Apply WAF rules that block requests missing expected authentication headers or cookies

bash

# Example WAF rule concept blocking unauthenticated access to the rating endpoint
# (adapt syntax to your WAF vendor)
SecRule REQUEST_URI "@beginsWith /assistant/bathroom-rating" \
  "id:1006265,phase:1,deny,status:401,\
   chain,msg:'Block unauthenticated RBI bathroom rating access'"
  SecRule &REQUEST_HEADERS:Authorization "@eq 0"