add_tx_pub_key_to_extra(tx, txkey_pub); call in src/cryptonote_core/cryptonote_tx_utils.cpp.Even though that the severity of this issue is very high (9 out of 10) it seems that no exchange reported the stolen funds or got affected (there's no evidence or news on that).
The error also affected the tokens, which used the Monero code base.
Experts have discovered a vulnerability node and an open vector, convenient for the implementation of DoS-attacks in order to create an overload in the Monero blockchain. Currently, the vulnerabilities are eliminated.
In July this year, the international cyber security company Kudelski Security has completed the verification of the new Monero protocol.
Experts have managed to identify only a few minor deviations, which are already corrected by the developers. In other aspects, the result is extremely positive.
The protocol is to be introduced into the main network in the early to mid-autumn of 2018. Monero is waiting for 2 more audits from Quarkslab and Benedikt Bünz, while the protocol is in the test network. Experts believe that after the launch of the protocol, the rate of cryptocurrency may go up.