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jakub_g
You can exploit this trick to some extent to name a file in a way that spoofs its real extension. E.g. name an .exe file such that it looks like if it was .doc (and give the exe an icon associated often with .doc to be even more convincing).
hayksaakian
The URL is on the left of the submission title.

Is this somehow related?

13
The submission title is actually "txet lanoitcerid-iB", with a Right To Left Override control character at the front. The whole line is in reverse it just doesn't look like it when rendered in your browser. There's a variety of control characters in unicode which let you stack, reverse, raise and lower individual pieces of text as you desire.

‮.ekil skool yllaer ti tahw ees ll'uoy dna enil siht gnitsap dna ypoc yrT

hayksaakian
Interesting, I viewedmthe source of the page, and some of the tags are reversed too.

Is this an exploit/attack vector?

cbd1984
Anything that can confuse a person is a potential exploit vector.

That said, I don't know of any specific exploits which rely on this behavior.

kowdermeister
Yes, right click -> inspect element on the link.
glifchits
Take a closer look at the URL while you're at it. It may look like an obscure domain, but its really not.
im3w1l
You can do the same with sourcecode too.

    System.out.println("Do ‮live‭"); // not ‬doog
Right-left-override is fun, but to see it really shine you have to combine it with some pop-directional-formatting.
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