assistant platform: Use of Client-Side Authentication
CVE-2025-62650 is a critical-severity use of client-side authentication vulnerability in assistant platform from Restaurant Brands International, with a CVSS 3.1 base score of 9.9 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected assistant platform versions: 2025-09-06 and earlier. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.5% chance of exploitation within 30 days, which is low compared with other CVEs.
Critical severity: a successful attack would have severe impact.
What to do
- Check which version of assistant platform you run against the affected versions below, and install the vendor's latest release.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Restaurant Brands International | assistant platform | 2025-09-06 and earlier | Not stated |
| Rbi | Restaurant Brands International Assistant | 2025-09-06 and earlier | Not stated |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- ChangedThe attack can reach beyond the vulnerable component into other systems.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- LowLimited modification of data is possible.
- Availability
- LowPerformance or availability is reduced.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:L. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 8.3 | High | CNA (mitre.org) |
| CVSS 3.1 | 9.9 | Critical | NVD |
Official description
The Restaurant Brands International (RBI) assistant platform through 2025-09-06 relies on client-side authentication for use of the diagnostic screen.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Use of Client-Side Authentication
A client/server product performs authentication within client code but not in server code, allowing server-side authentication to be bypassed via a modified client that omits the authentication check.
How developers prevent this class of flaw
- Do not rely on client side data. Always perform server side authentication.
More Use of Client-Side Authentication vulnerabilities (CWE-603)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: poc, automatable: yes, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Third-party and government advisories
- archive.today/fMYQpThird Party Advisory
- malwarebytes.com/blog/news/2025/09/popeyes-tim-hortons-burger-king-platforms-have-catastrophic-vulnerabilitie…Press/Media Coverage, Third Party Advisory
- yahoo.com/news/articles/burger-king-hacked-attackers-impressed-124154038.htmlPress/Media Coverage, Third Party Advisory
Other references
- bobdahacker.com/blog/rbi-hacked-drive-thrus/Permissions Required
- web.archive.org/web/20250906134240/https:/bobdahacker.com/blog/rbi-hacked-drive-thrusNot Applicable
Other vulnerabilities in assistant platform
- 7.7 High severity
- 9.9 Critical severity
- 7.7 High severity
- 8.6 High severity
Recent Use of Client-Side Authentication vulnerabilities
- 7.5 High severity
- 7.5 High severity
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