Poloniex hacker just lost $2,500,000 to a known ERC-20 flaw that I described in 2017

Poloniex exchange was hacked but the hacker lost his tokens in GLM contract.

I wrote a post about it earlier but it was deleted from this subreddit so I'm writing it again in the comment below!

(Realized my comment is not visible for most users either)

Here is my post on the forum: https://ethereum-magicians.org/t/poloniex-hacker-just-lost-2-500-000-to-a-known-erc-20-security-flaw-that-i-described-in-2017/16543

Here is the original content: https://gist.github.com/Dexaran/9bd90c1885b4818573368ad02b784125