GHSA-mpgr-2cx9-327h

### Impact _What kind of vulnerability is it? Who is impacted?_

Servers running SSB-DB 20.0.0 (which is packaged with SSB-Server 16.0.0) must upgrade immediately.

**There is no evidence that other SSB apps are vulnerable or that this problem has been exploited in the wild.**

The `get()` method is supposed to only decrypt messages when you explicitly ask it to, but there's a bug where it's decrypting any message that it can. This means that it's returning the decrypted content of private messages, which a malicious peer could use to get access to private data. This only affects peers running SSB-DB@20.0.0 who also have private messages, and is only known to be exploitable if you're also running SSB-OOO (default in SSB-Server), which exposes a thin wrapper around `get()` to anonymous peers.

### Patches _Has the problem been patched? What versions should users upgrade to?_

Yes, please upgrade to SSB-DB 20.0.1 (or SSB-Server 16.0.1) immediately.

### Workarounds _Is there a way for users to fix or remediate the vulnerability without upgrading?_

You may be able to disable the most obvious attack vector, SSB-OOO, by disabling the plugin, but you should upgrade immediately anyway.

### For more information

If you have any questions or comments about this advisory, open an issue in [SSB-DB](https://github.com/ssbc/ssb-db/)