Get €20 in Bitcoin when you sign up and trade €50+ in crypto before 31 August 2026. Terms apply. Warning: If you invest in this product, you may lose some, or all, of the money you invest. The value of crypto-assets may rise or fall rapidly. Past performance is not indicative of future results. To learn more see our Risk Disclosures.

    Bug Bounty

    Our bug bounty program offers Bitcoin rewards to anyone who discovers a new vulnerability in our code.

    Bug bounty

    Find our flaws

    What are we looking for?

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    Cross-site scripting

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    Cross-site request forgery

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    Remote code execution

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    Click-jacking

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    Code injection

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    Leaks of sensitive data

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    Authentication bypass

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    Server-side request forgery (SSRF)

    How it works

    In order to claim a bug bounty, you must:

    • Discover an entirely unknown vulnerability.
    • Alert us before posting the bug anywhere else – and give us sufficient time to patch the issue.
    • Not use the exploit to steal money or data from CoinJar or its customers. If the exploit requires account access, you must use your own.

    If you have any doubts or questions, email us at security@coinjar.com.

    Ineligible bounties

    We don’t reward bounties for any vulnerabilities not under our direct control. For example:

    • Social engineering
    • Issues requiring physical access to hardware
    • Vulnerabilities in 3rd party software (Ruby, nginx, etc)
    • Denial of Service
    • Usability issues

    Report a bug

    Please fill out the form below to report an issue. Include as much detail about the exploit as you can and a BTC address for us to send the reward to. Our Security Team will get back to you as soon as possible. Your information is handled in accordance with CoinJar’s Privacy Policy.

    Your information is handled in accordance with CoinJar’s Privacy Policy.

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