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Lemmy Security Advisory for Versions < 0.19.1: Private message details leak. [X post from [email protected]] (lemmy.ml)

submitted 1 year ago by Ziggurat to c/main

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For those using Private message on Lemmy, there is a major vulnerability. It seems that this instance still runs 18.5

I know that our beloved admins are volunteers and busy, so I don't blame them for not updating, but while waiting for the update be aware that your PM are as public as your comments

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[–] can 8 points 1 year ago* (last edited 1 year ago) (1 children)

On the matrix chat TheDude mentioned he was made aware of the vulnerability a while ago and has already patched it.

And in case you're not aware, the direct messages here were never that private to begin with. Any admin of a federated instance has access so a bad actor could accomplish this with some dedication anyway.

[–] Ziggurat 3 points 1 year ago (2 children)

Good to know thas it was patched. Indeed, an issue with federated app is that, instance admin could be dishonest and spy us (while proprietary app will do it). But to my understanding the bug was fully public so a message like call me , on 0123 456 789 could reveal your phone number

[–] can 4 points 1 year ago* (last edited 1 year ago)

Even with this patched I would not advise stating your phone number expecting full security.

[–] InEnduringGrowStrong 1 points 1 year ago

I can confirm that DMs are not encrypted and are stored in clear text and therefore could technically be read by admins with database access.
While we are not actively looking or browsing through DMs, I'd still recommend not sharing anything sensitive through lemmy DMs and instead use something like Matrix or Signal.