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This issue is already quite widely publicized and quite frankly "we're handling it and removing this" is a much more harmful response than I would hope to see. Especially as the admins of that instance have not yet upgraded the frontend version to apply the urgent fix.
It's not like this was a confidential bug fix, this is a zero day being actively exploited. Please be more cooperative and open regarding these issues in your own administration if you're hosting an instance. 🙏
IMO it’s not a good idea to be discussing attack vectors publicly when a number of other instances are unpatched and the exploit has been in the wild for less than a day.
I agree that admins need to work together, but discussing it in public on Lemmy so soon after the attack isn’t the way. There exists a Matrix channel for admins, that’s where this type of thing should go.
If this was not a zero day being actively exploited then you would be 100% correct. As it is currently being exploited and a fix is available, visibility is significantly more important than anything else or else the long tail of upgrades is going to be a lot longer.
Keep in mind a list of federated instances and their version is available at the bottom of every lemmy instance (at /instances), so this is a really easy chain to follow and try to exploit.
The discovery was largely discussed in the lemmy-dev Matrix channel, fixes published on github, and also discussed on a dozen alternate lemmy servers. This is not an issue you can really keep quiet any longer, so ideally now you move along to the shout it from the mountaintop stage.