A new set of Critical vulnerabilities affecting users of PGP and S/MIME Email encryption may reveal the encrypted Emails in clear text including the past Emails. Email encryption is the widely used standard that developed to securely transmit the data over the network. PGP/GPG is an encryption program that provides cryptographic privacy and authentication for data communication which is used for signing, encrypting, and decrypting texts in email communication. Electronic Frontier Foundation warned used to disable PGP, related plugins in following Email client.”]
Source: https://gbhackers.com/vulnerabilities-pgp-and-s-mime/