Circle BBP Bug Bounty Program

Program Overview

Circle BBP runs a bug bounty program on HackerOne. The program has 29 in-scope assets and is managed by HackerOne's triage team.

In-Scope Assets

Asset	Type	Max Severity	Eligible
api.circle.com	URL	Critical	Bounty
app.circle.com	URL	Critical	Bounty
console.circle.com	URL	Critical	Bounty
http://github.com/circlefin/noble-cctp	SMART_CONTRACT	Critical	Bounty
https://github.com/circlefin/aptos-cctp	SOURCE_CODE	Critical	Bounty
https://github.com/circlefin/arc-node	SOURCE_CODE	Critical	Bounty
https://github.com/circlefin/arc-remote-signer	SOURCE_CODE	Critical	Bounty
https://github.com/circlefin/buidl-wallet-contracts	SMART_CONTRACT	Critical	Bounty
https://github.com/circlefin/evm-cctp-contracts	SMART_CONTRACT	Critical	Bounty
https://github.com/circlefin/evm-cpn-contracts	SMART_CONTRACT	Critical	Bounty
https://github.com/circlefin/evm-gateway-contracts	SMART_CONTRACT	Critical	Bounty
https://github.com/circlefin/evm-xreserve-contracts	SMART_CONTRACT	Critical	Bounty
https://github.com/circlefin/malachite	SOURCE_CODE	Critical	Bounty
https://github.com/circlefin/noble-fiattokenfactory	SMART_CONTRACT	Critical	Bounty
https://github.com/circlefin/solana-cctp-contracts	SMART_CONTRACT	Critical	Bounty
https://github.com/circlefin/solana-gateway-contracts	SMART_CONTRACT	Critical	Bounty
https://github.com/circlefin/stablecoin-aptos	SOURCE_CODE	Critical	Bounty
https://github.com/circlefin/stablecoin-evm	SMART_CONTRACT	Critical	Bounty
https://github.com/circlefin/stablecoin-near	SMART_CONTRACT	Critical	Bounty
https://github.com/circlefin/stablecoin-starknet	SOURCE_CODE	Critical	Bounty
https://github.com/circlefin/stablecoin-sui	SOURCE_CODE	Critical	Bounty
https://github.com/circlefin/stablecoin-xlm	SOURCE_CODE	Critical	Bounty
https://github.com/circlefin/starknet-cctp	SMART_CONTRACT	Critical	Bounty
https://github.com/circlefin/stellar-cctp	URL	Critical	Bounty
https://github.com/circlefin/sui-cctp	SOURCE_CODE	Critical	Bounty
rpc.blockdaemon.testnet.arc.network	URL	Critical	Bounty
rpc.drpc.testnet.arc.network	URL	Critical	Bounty
rpc.quicknode.testnet.arc.network	URL	Critical	Bounty
rpc.testnet.arc.network	URL	Critical	Bounty

Out-of-Scope Assets

• x.com
• youtube.com

Tips for Hacking Circle BBP

1. Read the policy — Understand what's in scope, out of scope, and any specific testing restrictions before you start.
2. Enumerate the attack surface — Use subdomain enumeration and directory bruteforcing to map all accessible endpoints.
3. Focus on high-impact bugs — Look for SQL injection, SSRF, and IDOR vulnerabilities first.
4. Test authentication flows — Check for OAuth misconfigurations and CSRF in login/signup flows.
5. Write clear reports — Include steps to reproduce, impact assessment, and suggested remediation. Use Burp Suite to capture evidence.

Frequently Asked Questions

How do I start hacking Circle BBP?

Sign up on HackerOne, read the program policy carefully, review the in-scope assets listed above, and start testing. Always stay within scope and follow responsible disclosure guidelines.

Does Circle BBP pay bounties?

Yes, Circle BBP offers monetary rewards for valid security vulnerabilities.

What types of vulnerabilities does Circle BBP accept?

Circle BBP accepts reports for vulnerabilities found in their 29 in-scope assets. Common accepted vulnerability types include XSS, SQL injection, SSRF, IDOR, authentication bypass, and RCE. Check the program policy for specific exclusions.