• $100 – $3,000 per vulnerability
  • Partial safe harbor
  • Managed by Bugcrowd

Program stats

315 vulnerabilities rewarded

Validation within 2 days
75% of submissions are accepted or rejected within 2 days

$100 average payout (last 3 months)

Latest hall of famers

Recently joined this program

1342 total


Please note: This program does not allow disclosure. You may not release information about vulnerabilities found in this program to the public.

Have thoughts on how this program could be improved? Please provide your feedback to Bugcrowd and Mastercard!

mastercard is a technology company in the global payments industry. We operate the world’s fastest payments processing network, connecting consumers, financial institutions, merchants, governments and businesses in more than 210 countries and territories. Mastercard products and solutions make everyday commerce activities – such as shopping, traveling, running a business and managing finances – easier, more secure and more efficient for everyone. For nearly half a century, MasterCard has been a leader in safety and security. As payment methods continue to evolve, MasterCard is committed to advancing digital security, which includes rigorous testing for potential vulnerabilities. You can help us make our products and services even safer and earn rewards by reporting potential vulnerabilities.

A Couple Important Requirements for Mastercard:

  • When submitting a report to Mastercard, please be sure to include your IP address that you were testing from somewhere in your report. It is greatly helpful to MasterCard.
  • Due to GDPR and legal requirements. All testing must be conducted using your email ID only. If you fail to use your email ID, you run the risk of getting blocked from accessing MasterCard applications.


Rewards will be facilitated through Payoneer ONLY (Setup payment methods)

For the initial prioritization/rating of findings, this program will use the Bugcrowd Vulnerability Rating Taxonomy. However, it is important to note that in some cases a vulnerability priority will be modified due to its likelihood or impact. In any instance where an issue is downgraded, a full, detailed explanation will be provided to the researcher - along with the opportunity to appeal, and make a case for a higher priority.

Use of automated scanners and tools to find vulnerabilities is strictly not allowed. MasterCard requests that testers do not perform automated/scripted testing of web forms, especially "Contact Us" forms that are designed for customers to contact the Support team.


In scope

Target name Type
Simplify Commerce - Website Testing - Website Testing - (German) - Website Testing - (French) - Website Testing - Website Testing - Website Testing - Website Testing Website Testing Website Testing

Out of scope

Target name Type
Core - Website Testing
All Available Mastercard Developer APIs API Testing Website Testing Website Testing Website Testing
Order placement on Website Testing

Any domain/property of Mastercard not listed in the targets section is out of scope. This includes any/all subdomains not listed above.

Out of Scope

The following targets are explicitly out of scope and any submissions reported will be marked out of scope.

  • All Available Mastercard Developer APIs

All vulnerabilities discovered and reported on other targets (including subdomains) will be accepted, but are not eligible for a reward at this time. These submissions will be marked "Not Applicable" to prevent negative ratings. But out of scope findings, we highly recommend submitting the vulnerabilities/findings in our VDP program, so researcher can get rewards points.

Known Issue: The Mastercard Payment Gateway Virtual Payment Client (VPC) API that uses the MD5 based cryptogram to provide an integrity check of request parameters contains a critical vulnerability that allows limited modification of those parameters without causing a change in the cryptogram value. This vulnerability is remotely exploitable and does not require authentication. Mastercard has assessed the severity as CVSS 7.5. Mastercard recommends all customers to update their integration to use the HmacSHA256 based cryptogram, which is not vulnerable to parameter tampering. We thank Yohanes Nugroho for his support to identify this security vulnerability to protect our customers.

Related to GitHub:

  • Any finding related to the GitHub: API keys/passwords/SSH Private Keys. Please validate from your end once before submitting here. Sometimes employees may have pushed their personal project or test project by mistakenly to GitHub. That we may not consider here. Please submit those to our VDP program.

Related to Subdomain Takeovers:

  • Please submit the subdomain taken over findings to our VDP program if it is not in scope here.

Additional information

Mastercard Donate
Researchers are encouraged to create their own accounts by visiting this page: and signing up. When signing up, please use the following credit card info:

Card number: 5333171009808520
Expiration: 09/20     
CVC: 464

Simplify Commerce
Simplify Commerce is a uniquely versatile, highly scalable and incredibly simple cloud-based payments platform from MasterCard. It works for card brands that the acquirer supports. Designed with the small business owner in mind, it’s a simple, easily integrated and dynamic platform that makes it a strong choice for businesses of all sizes.

  • DO NOT register a new merchant account or attempt to accept real payments as this will involve parties which are out of scope. We have ensured the sandbox has the same functionality needed for testing
  • Testing is limited to the developer sandbox environment
  • To create your account register as a developer. Accounts can be self-provisioned by using your @bugcrowdninja email and the test numbers are available here.
  • If a link goes outside the or domains it is no longer in scope and should not be tested.
  • Simplify has two live partners Priority Payment Systems, EVO Payment Systems which are explicitly out of scope.
Priceless Cities is a core tenet of MasterCard’s world-renowned 18 year-old Priceless marketing platform that is currently available in 112 countries and 53 languages. The platform provides exclusive curated experiences and special access in over 35 cities marketed in over 52 countries.

  • As a highly integrated application please note that and extend to partners and are* not* in scope.
  • Accounts can be self-provisioned by using your @bugcrowdninja email.
  • Please use 5555 5555 5555 4444 to register and test orders on
  • is marked out of scope but issues previously reported for will remain valid for bounty (if finding is qualified) and similar issues newly reported for will be marked duplicate
  • In scope target is guarded by http authentication use below username and password for login
    -- Username: mastercard --password: priceLESS

Mastercard Regional Websites
The regional MasterCard sites are the company’s external websites, which include public information available to unauthenticated users. The sites include outbound links to resources not hosted on the domain. Only the core MasterCard domain is in scope and open to testing. Please be mindful of which domain / sub domain you are testing.
The APIs for the developer portal are fully out of scope for this. You may either use an existing account, or create new users are needed using your <> address.


Please create an account on your own using your email address. Your 'bugcrowdninja' email address is your All emails will go to the email address associated with your account.

Focus Areas

  • Cross Site Scripting (XSS)
  • Cross Site Request Forgery (CSRF)
  • Insecure direct object references
  • Injection Vulnerabilities
  • Authentication Vulnerabilities
  • Server-side Code Execution
  • Privilege Escalation
  • Significant Security Misconfiguration (when not caused by user)
  • Any out of the box issues which could lead to compromise or leakage of data and directly affect the confidentiality or integrity of user data of which affects user privacy.

Prohibited Testing

  • Do NOT conduct non-technical attacks such as social engineering, phishing or unauthorized access to infrastructure are not allowed.
  • Do NOT test the physical security of MasterCard offices, employees, equipment, etc.
  • Do NOT perform any attack that could harm our services (E.g.: DDoS/Spam)
  • Do NOT attack, in any way, our end users, or engage in trade of stolen user credentials.
  • Do NOT use automated scanners and tools to find vulnerabilities are strictly not allowed.
  • Do NOT Perform automated/scripted testing of web forms, especially "Contact Us" forms that are designed for customers to contact our support team.
  • You may investigate or target vulnerabilities against your own or test accounts, but testing must not disrupt or compromise any data or data access that is not yours.
  • Automated scanners/tools are strictly prohibited (not allowed).
  • Confidentiality: If your testing or investigation inadvertently causes a privacy violation or disruption (such as accessing account data, service configurations, or other confidential information), please include this information in your report (or email

The following finding types are specifically excluded from the bounty:

  • Pivoting, scanning, and vulnerability exploitation.
  • Exfiltration of data from MasterCard systems.
  • Email spoofing
  • Missing or incorrect SPF/DMARC/DKIM records of any kind
  • Descriptive error messages (e.g. Stack Traces, application or server errors).
  • HTTP 404 codes/pages or other HTTP non-200 codes/pages.
  • Fingerprinting / banner disclosure on common/public services.
  • Disclosure of known public files or directories, (e.g. robots.txt).
  • Clickjacking and issues only exploitable through clickjacking.
  • Login/Logout/Unauthenticated/low-impact/anonymous user CSRF.
  • Presence of application or web browser ‘autocomplete’ or ‘save password’ functionality.
  • Lack of Secure/HTTPOnly flags on non-sensitive Cookies.
  • Lack of Security Speedbump when leaving the site.
  • Weak Captcha / Captcha Bypass
  • Forgot Password page brute force and account lockout not enforced.
  • OPTIONS HTTP method enabled
  • Username / email enumeration
    • via Login Page error message
    • via Forgot Password error message
  • Any missing HTTP security headers
  • SSL Issues, e.g.
    • SSL Attacks such as BEAST, BREACH, Renegotiation attack
    • SSL Forward secrecy not enabled
    • SSL weak / insecure cipher suites
  • Vulnerabilities affecting users of outdated browsers or
    • IE < 9
    • Chrome < 40
    • Firefox < 35
    • Safari < 7
    • Opera < 13

Program rules

This program follows Bugcrowd’s standard disclosure terms.

This program does not offer financial or point-based rewards for P5 — Informational findings. Learn more about Bugcrowd’s VRT.