It's a pity that there is no description of what it is supposed to be used for.
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That's only true if you ignore all the details.
As usual, you cannot make a coherent understanding on just about any subject by reading headlines alone. Life would have taught you by now that the devil is in the details.
WP uses salt and multiple rounds of hashing, fully mitigating the md5 collisions being topic of discussion here.
So no, wp doesn't "use md5" in the sense that they would be vulnerable to this type of attack.
Source: https://developer.wordpress.org/reference/functions/wp_hash_...
The amount of sweet, sweet irony displayed here will make me diabetic. Did you read the article at all? Salting? What are you on about?
Honestly, it feels that some HN commenters are LLMs instructed to defend a given entity.