Drawing attention on this instance so Admins are aware and can address the propagating exploit.

EDIT: Found more info about the patch.

A more thorough recap of the issue.

GitHub PR fixing the bug: https://github.com/LemmyNet/lemmy-ui/pull/1897/files

If your instance has custom emojis defined, this is exploitable everywhere Markdown is available. It is NOT restricted to admins, but can be used to steal an admin’s JWT, which then lets the attacker get into that admin’s account which can then spread the exploit further by putting it somewhere where it’s rendered on every single page and then deface the site.

If your instance doesn’t have any custom emojis, you are safe, the exploit requires custom emojis to trigger the bad code branch.

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20 points

And this is why you don’t trust tankies

What are you referring to here?

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8 points

the lemmy devs are open communists. that’s it lol

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10 points

Wow that is extremely irrelevant

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11 points

yeah, kind of insane the grudge people hold about it, people like that user spread all these spooky posts about how the devs are communists coming to kill you or something and that’s why you should use kbin (I’m only slightly exaggerating, the way these people post about it makes it sound like the devs are directly involved with like human rights abuses or something lol)

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-15 points

The Lemmy devs are ideological fans of communist China.

They’re likely to cooperate with them down the line and take actions that compromise their software, send data to others who are in their circle, and so on and so forth.

A lot of people say since Lemmy is open source you can trust it, but open source isn’t a protection against malicious code. Here you can see an example of just how easy it is to sneak something by. Even though this wasn’t a malicious example it still allowed admin accounts to be compromised

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13 points
*

You seem to be coming up with conspiracy theories, don’t you?

And you don’t seem to know how (developing) software works, and that people aren’t infallible when it comes to avoiding bugs.

Popularity just also increases the attack surface to a project, all these bugs can absolutely also occur in kbin. Unless software is mathematically proven (which is practically impossible in this context), it’s always possible that there is a bug lurking around the corner.

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-7 points

And you don’t seem to know how (developing) software works, and that people aren’t infallible when it comes to avoiding bugs.

I’m literally a professional software developer.

I’m also telling you that people are fallible, bugs are easily missed, and you shouldn’t trust a project to be secure just because it’s open source.

Popularity just also increases the attack surface to a project, all these bugs can absolutely also occur in kbin.

Yes.

And kbin doesn’t have developers that have reason to attempt to create and support malicious code. You can trust them to at least attempt to keep the code base clean in good faith. You can’t trust Lemmy to do the same.

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2 points

I know you’re getting it from all angles right now, but

Do you have a source for their support of Communist China? I know they’re purported communist, but I didn’t notice any outright support of the Chinese form of communism.

Not trying to argue, but genuinely trying to stay informed

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-4 points

Check out lemmy.ml, which is the devs instance. You’ll see it very quickly.

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1 point

I think to get the best view of their political stance is to read dessalines essays.

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