Truecaller Bug Bounty Program

Program Overview

Truecaller runs a bug bounty program on HackerOne. The program has 9 in-scope assets and is managed by HackerOne's triage team.

In-Scope Assets

Asset	Type	Max Severity	Eligible
*-asia-south1.truecaller.com	WILDCARD	Critical	Bounty
*-eu.truecaller.com	WILDCARD	Critical	Bounty
*-noneu.truecaller.com	WILDCARD	Critical	Bounty
448142450	APPLE_STORE_APP_ID	Critical	Bounty
business-resources.truecaller.com	URL	Medium	Bounty
business.truecaller.com	URL	Critical	Bounty
com.truecaller	GOOGLE_PLAY_APP_ID	Critical	Bounty
web.truecaller.com	URL	High	Bounty
www.truecaller.com	URL	High	Bounty

Out-of-Scope Assets

• adsmanager.truecaller.com
• community.truecaller.com
• support.truecaller.com

Tips for Hacking Truecaller

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 Truecaller ?

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 Truecaller pay bounties?

Yes, Truecaller offers monetary rewards for valid security vulnerabilities.

What types of vulnerabilities does Truecaller accept?

Truecaller 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.