Program Overview
Early Warning runs a bug bounty program on HackerOne. The program has 9 in-scope assets and is managed by HackerOne's triage team.
9
In-Scope Assets
3h
Avg Response
99%
Efficiency
1d
Avg Bounty Time
356d
Avg Resolve
In-Scope Assets
| Asset | Type | Max Severity | Eligible |
|---|---|---|---|
| *.earlywarning.com | WILDCARD | Critical | Bounty |
| *.zelle.com | WILDCARD | Critical | Bounty |
| *.zellepay.com | WILDCARD | Critical | Bounty |
| developer*.earlywarning.com | WILDCARD | Critical | Bounty |
| ews-fusion.my.site.com | URL | Critical | Bounty |
| support*.earlywarning.com | WILDCARD | Critical | Bounty |
| www.certos.com | URL | Critical | Bounty |
| zelleservice.my.salesforce.com | URL | Critical | Bounty |
| zelleservice.my.site.com | URL | Critical | Bounty |
Out-of-Scope Assets
- *.clearxchange.com
- *bc.earlywarning.com
- api.zmsp.*.earlywarning.io
- ccpa*.zellepay.com
- ccpa.zellepay.com
- demo.earlywarning.com
- docs.earlywarning.com
- flip0717.earlywarning.com
- http://api.zellepay.com
- http://api.zmsp.earlywarning.com
- http://earlywarningapi.force.com
- platform.cat.earlywarning.io
- platformtest.cat.earlywarning.io
- toolkit.zellepay.com
- zellepay.earlywarning.com
- zellepay.force.com
Tips for Hacking Early Warning
- Read the policy — Understand what's in scope, out of scope, and any specific testing restrictions before you start.
- Enumerate the attack surface — Use subdomain enumeration and directory bruteforcing to map all accessible endpoints.
- Focus on high-impact bugs — Look for SQL injection, SSRF, and IDOR vulnerabilities first.
- Test authentication flows — Check for OAuth misconfigurations and CSRF in login/signup flows.
- 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 Early Warning?
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 Early Warning pay bounties?
Yes, Early Warning offers monetary rewards for valid security vulnerabilities.
What types of vulnerabilities does Early Warning accept?
Early Warning accepts reports for vulnerabilities found in their 9 in-scope assets. Common accepted vulnerability types include XSS, SQL injection, SSRF, IDOR, authentication bypass, and RCE. Check the program policy for specific exclusions.