Description

Nexo is the premier wealth platform for digital assets. Since 2018, we’ve upheld the highest infrastructure security and client care standards, helping millions achieve their goals. Imagine a world where your wealth moves as fast as you do. Where opportunities don't sleep, and neither do your assets. This is the future Nexo is building. Blockchain applications and digital assets change the fundamentals of how we invest, save, and grow our financial resources. At Nexo, we recognize this evolution goes hand-in-hand with shifting lifestyles and expectations. We blend cutting-edge blockchain technology with time-tested financial principles, offering a platform where your assets can truly work for you. Welcome to the new era of wealth building. Powered by blockchain, shaped by you. Wealth forward.

Bounties

This is a responsible disclosure program without bounties.

Rules of engagement
Required
Not applicable
max. 1 request /sec
X-Intigriti-Username: {Username}

By participating in this program, you agree to:

  • Respect the Community Code of Conduct
  • Respect the Intigriti Terms and Conditions
  • Respect the scope of the program
  • Not discuss or disclose vulnerability information without prior written consent (including PoC's on YouTube and Vimeo)
  • You are not currently a Nexo employee.

Validation times

We will validate all submissions within the below timelines, once your submission has been verified by Intigriti.
Submissions validated outside of this may be awarded a $25 bonus.

Vulnerability Severity Time to validate
Exceptional 2 Working days
Critical 2 Working days
High 5 Working days
Medium 15 Working days
Low 15 Working days

This remains at the discretion of Nexo to award.

Check our fix
We offer up to $50 bonus to verify a resolved issue for us (when requested).
This remains at the discretion of Nexo to award.

In scope

Introduction

We are happy to announce our program! We've done our best to clean up our known issues and now would like to request your help to spot the ones we missed!

Our worst-case scenarios are:

  • Breach of confidential data;
  • Business-logic flaws;
  • Customer accounts being taken over;
  • Performing fraudulent transactions.

Infrastructure information:

  • AWS-based infrastructure

Feedback
Would you like to help us improve our program or have some feedback to share, please send your anonymous feedback here:

Program feedback link
Please note this form will be checked periodically and should not be used for submission or support queries.

Out of scope

All mobile applications build by the Nexo's team.

All third-party integrations.

The help/support chat function.

Application

  • API key disclosure without proven business impact
  • Wordpress usernames disclosure
  • Pre-Auth Account takeover/OAuth squatting
  • Self-XSS that can't be used to exploit other users
  • Verbose messages/files/directory listings without disclosing any sensitive information
  • CORS misconfiguration on non-sensitive endpoints
  • Missing cookie flags
  • Missing security headers
  • Cross-site Request Forgery with no or low impact
  • Presence of autocomplete attribute on web forms
  • Reverse tabnabbing
  • Bypassing rate-limits or the non-existence of rate-limits.
  • Best practices violations (password complexity, expiration, re-use, etc.)
  • Clickjacking without proven impact/unrealistic user interaction
  • CSV Injection
  • Sessions not being invalidated (logout, enabling 2FA, etc.)
  • Tokens leaked to third parties
  • Anything related to email spoofing, SPF, DMARC or DKIM
  • Content injection without being able to modify the HTML
  • Email bombing
  • HTTP Request smuggling without any proven impact
  • Homograph attacks
  • XMLRPC enabled
  • Banner grabbing/Version disclosure
  • Not stripping metadata of files
  • Same-site scripting
  • Subdomain takeover without taking over the subdomain
  • Arbitrary file upload without proof of the existence of the uploaded file
  • Blind SSRF without proven business impact (pingbacks aren't sufficient)
  • Disclosed/misconfigured Google Maps API keys
  • Host header injection without proven business impact

General

  • In case that a reported vulnerability was already known to the company from their own tests, it will be flagged as a duplicate
  • Theoretical security issues with no realistic exploit scenario(s), PoC's, attack surfaces, or issues that would require complex end user interactions to be exploited
  • Spam, social engineering and physical intrusion
  • DoS/DDoS attacks or brute force attacks
  • Vulnerabilities that only work on software that no longer receive security updates
  • Attacks requiring physical access to a victim's computer/device, man in the middle or compromised user accounts
  • Recently discovered zero-day vulnerabilities found in in-scope assets within 14 days after the public release of a patch or mitigation may be reported, but are usually not eligible for a bounty
  • Reports that state that software is out of date/vulnerable without a proof-of-concept
Severity assessment

This program follows Intigriti's triage standards based on the proof of concept.

FAQ

Where can we get credentials for the app?

You can self-register on the application but please don’t forget to use your @intigriti.me address.

How can I transfer money to another user?

You can use the built-in functionality in the platform. By scrolling down to the asset, you want to send -> click on Transfer, and follow the on-screen steps.

I have "Unfortunately, Nexo is not available in your country, region or state. Please contact Nexo Support if you believe this is an error." error. What to do?

  • If you are NOT a citizen or a resident of one of the following countries but you are currently in it, use a VPN to register. After that, you will be able to use our platform freely.
  • If you are not in one of those countries but still can not register, check our Terms and Conditions section four "ONBOARDING" for more information or contact us directly.
  • If you are a citizen or a resident of one of those countries, you will not be able to use our products. If you were invited to the program and you are a citizen or a resident of one of those countries, please excuse us.

Can I have a "test" money?

By testing on the production environment, we cannot supply researchers with testing money. Any user has to follow our Terms and Conditions while using the platform and putting money on the platform will be at their own risk.

How will my submissions be rewarded?

By participating in our vulnerability disclosure program, you can earn reputation points, improve your rank, climb the leaderboard, and receive an invitation to our private program.

All aboard!
Please log in or sign up on the platform

For obvious reasons we can only allow submissions or applications for our program with a valid Intigriti account.

It will only take 2 minutes to create a new one or even less to log in with an existing account, so don't hesitate and let's get started. We would be thrilled to have you as part of our community.

Activity
11/12
Nexo updated the confidentiality level to public
11/12
Nexo updated the confidentiality level to registered
11/12
Nexo updated the confidentiality level to application
11/11
Nexo's VDP
launched