Nubank Response looks forward to working with the security community to find vulnerabilities in order to keep our businesses and customers safe.

Response Targets

Nubank's Security Team will make the best effort to meet the following SLAs for hackers participating in our program:

| Type of Response | SLA in business days |

| ------------- | ------------- |

| First Response | 2 days |

| Time to Triage | 2 days |

| Time to Resolution | depends on severity and complexity |

We’ll try to keep you informed about our progress throughout the process.

Disclosure Policy

• As this is a private program, please do not discuss this program or any vulnerabilities (even resolved ones) outside of the program without express consent from the organization.

• Follow HackerOne's disclosure guidelines.

Program Rules

• In order to ensure that your activity is not mistaken as malicious and blocked, we're asking that you use HTTP Headers. Example: "X-Correlation-Id: h1-handle"

• Please provide detailed reports with reproducible steps. If the report is not detailed enough to reproduce the issue, the issue may not be marked as triaged.

• Submit one vulnerability per report, unless you need to chain vulnerabilities to provide impact.

• When duplicates occur, we only triage the first report that was received (provided that it can be fully reproduced).

• Multiple vulnerabilities caused by one underlying issue will be treated as one valid report.

• Make a good faith effort to avoid privacy violations, destruction of data, and interruption or degradation of our service. Only interact with accounts you own or with the explicit permission of the account holder.

• Please note that only individuals with a Brazilian Tax Identification Number (TIN) will be able to sign up for bank accounts with NuBank. Any use of false identification or fraudulent activities is explicitly out of scope.

• All areas of scope outside of those requiring a Brazilian TIN can be accessed by hackers outside of this region.

• Participation in this program by Nubank's employees and/or Third Party Providers is not permitted and any reports submitted will be considered invalid.

Out of scope vulnerabilities

When reporting vulnerabilities, please consider (1) attack scenario/exploitability, and (2) security impact of the bug. The following issues are considered out of scope:

• Social engineering (e.g. phishing, vishing, smishing) is prohibited.

• Clickjacking on pages with no sensitive actions

• Cross-Site Request Forgery (CSRF) on unauthenticated forms or forms with no sensitive actions

• Attacks requiring MITM or physical access to a user's device.

• Previously known vulnerable libraries without a working Proof of Concept.

• Comma Separated Values (CSV) injection without demonstrating a vulnerability.

• Missing best practices in SSL/TLS configuration.

• Any activity that could lead to the disruption of our service (DoS).

• Content spoofing and text injection issues without showing an attack vector/without being able to modify HTML/CSS

• Rate limiting or bruteforce issues on non-authentication endpoints

• Missing best practices in Content Security Policy.

• Missing HttpOnly or Secure flags on cookies

• Missing email best practices (Invalid, incomplete or missing SPF/DKIM/DMARC records, etc.)

• Vulnerabilities only affecting users of outdated or unpatched browsers [Less than 2 stable versions behind the latest released stable version]

• Software version disclosure / Banner identification issues / Descriptive error messages or headers (e.g. stack traces, application or server errors).

• Tabnabbing

• Open redirect - unless an additional security impact can be demonstrated

• Issues that require unlikely user interaction

Safe Harbor

Any activities conducted in a manner consistent with this policy will be considered authorized conduct and we will not initiate legal action against you. If legal action is initiated by a third party against you in connection with activities conducted under this policy, we will take steps to make it known that your actions were conducted in compliance with this policy.

Thank you for helping keep Nubank Response and our users safe!