So last night a XSS scripting attack was found on all Lemmy instances. See the lemmy world update here https://feddit.uk/post/453040

What this means is that hackers could inject their own “script” when any user viewed a comment/post that the hackers made. The hackers would then grab your JWT token with the script so they could impersonate that user. (And perform any actions on behalf of the user)

Luckily, it looks like I haven’t been compromised so the site config should all be the same

What has been done about this

I’ve removed any comments or posts which included the script see here https://github.com/LemmyNet/lemmy-ui/issues/1895

I would have removed all custom emojis as well but there was none in our DB, this may potentially mean that this site was not affected. Just in case, I’ve also rotated the JWT tokens so all tokens are now invalid. This means you will have to logout and log back into the instance

Shoutout to @clara@feddit.uk for messaging me about this and bringing it to my attention

  • ᴇᴍᴘᴇʀᴏʀ 帝A
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    1511 months ago

    Thanks for doing this, sounds like people were on the ball and managed to sort it quickly.

    I imagine the code will be probed quite a bit and this won’t be the last time, the important thing is to move fast and sort it out.

  • snake_case
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    911 months ago

    Thanks for jumping on this so quickly! And all work you’re doing to support this new platform!!

  • @Digestive_Biscuit
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    11 months ago

    Great job!

    I don’t know if it’s related. Since today when I login to the Jerboa app then try to post or close/reopen the app my account for feddit.uk disappears from the app. I have to keep logging in.

    • @fakeman_pretendname
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      211 months ago

      You may need to clear the cache and data for Jerboa on your phone first, then log back in.

      • @Digestive_Biscuit
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        111 months ago

        Thanks for the tip. I just tried that, didn’t work. So I then I deleted all data and that did! It meant I had to login to all my accounts again but it seems to be working.

    • SayCyberOnceMore
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      211 months ago

      Just to say, mine seems ok after closing and reopening the app… but I’ll check again later.

  • @addie
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    511 months ago

    Cool! Thanks Tom, appreciate the update and the speedy response.

    • @tomOPMA
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      311 months ago

      Yeh fixed and fixed the issue where updating broke it so that shouldn’t happen anymore

  • @Fudgy
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    311 months ago

    Thanks for keeping us all safe… :)

  • LordWarfire
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    311 months ago

    Might not be related but after signing out I’ve not been able to sign back in to app.feddit.uk - using vger.app works fine though.

      • LordWarfire
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        211 months ago

        I just saw his post about doing an update - it’s let me in now

    • @RelentlessArts
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      111 months ago

      I’ve been able to sign into the generic wefwef webapp so unsure if there is a difference with the Feddit version.

  • Flax
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    111 months ago

    Ty for acting, however I cannot seem to log in on Jerboa. It shows me all of my subscribed feeds but then won’t let me comment. Closing and reopening the app logs me out again

    • @fakeman_pretendname
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      111 months ago

      You may need to clear the cache and data for Jerboa on your phone first, then log back in. I was having the same issue, but that seemed to fix it for me.

      • Flax
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        111 months ago

        Yep, fixed it for me also

  • clara
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    111 months ago

    glad you managed to protect our instance before anything bad happened, good job 🥳 i was worried i’d wake up to a rather spicy looking front page lol. thanks for the hard work!

  • @Fudgy
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    11 months ago

    deleted by creator