Program Overview
Costco runs a vulnerability disclosure program on HackerOne. The program has 14 in-scope assets and is managed by HackerOne's triage team.
14
In-Scope Assets
3h
Avg Response
100%
Efficiency
In-Scope Assets
| Asset | Type | Max Severity | Eligible |
|---|---|---|---|
| *.costco.ca | WILDCARD | Critical | No Bounty |
| *.costco.com | WILDCARD | Critical | No Bounty |
| *.costcobusinesscentre.ca | WILDCARD | Critical | No Bounty |
| *.costcobusinessdelivery.com | WILDCARD | Critical | No Bounty |
| *.costcotravel.ca | WILDCARD | Critical | No Bounty |
| *.costcotravel.com | WILDCARD | Critical | No Bounty |
| com.costco.app.android | GOOGLE_PLAY_APP_ID | Critical | No Bounty |
| com.costco.costco | APPLE_STORE_APP_ID | Critical | No Bounty |
| www.costco.ca | URL | Critical | No Bounty |
| www.costco.com | URL | Critical | No Bounty |
| www.costcobusinesscentre.ca | URL | Critical | No Bounty |
| www.costcobusinessdelivery.com | URL | Critical | No Bounty |
| www.costcotravel.ca | URL | Critical | No Bounty |
| www.costcotravel.com | URL | Critical | No Bounty |
Out-of-Scope Assets
- signin.costco.com
Tips for Hacking Costco
- 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 Costco?
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 Costco pay bounties?
No, Costco runs a Vulnerability Disclosure Program (VDP) without monetary rewards. You may receive recognition or swag.
What types of vulnerabilities does Costco accept?
Costco accepts reports for vulnerabilities found in their 14 in-scope assets. Common accepted vulnerability types include XSS, SQL injection, SSRF, IDOR, authentication bypass, and RCE. Check the program policy for specific exclusions.