# Security Policy

If you believe you've identified a security vulnerability in Mastodon (a bug that allows something to happen that shouldn't be possible), you should submit the report through our [Bug Bounty Program][bug-bounty]. Alternatively, you can reach us at <hello@joinmastodon.org>.

You should *not* report such issues on GitHub or in other public spaces to give us time to publish a fix for the issue without exposing Mastodon's users to increased risk.

## Scope

A "vulnerability in Mastodon" is a vulnerability in the code distributed through our main source code repository on GitHub. Vulnerabilities that are specific to a given installation (e.g. misconfiguration) should be reported to the owner of that installation and not us.

## Supported Versions

| Version | Supported        |
| ------- | ---------------- |
| 4.2.x   | Yes              |
| 4.1.x   | Yes              |
| 4.0.x   | No               |
| 3.5.x   | Until 2023-12-31 |
| < 3.5   | No               |