THREATIST.IORead the docs 4 records
MailMate before 1.11 automatically imported S/MIME certificates and thereby silently replaced existing ones.
MailMate before 1.11.3 mishandles a suspicious HTML/MIME structure in a signed/encrypted email.
The S/MIME specification allows a Cipher Block Chaining (CBC) malleability-gadget attack that can indirectly lead to plaintext exfiltration, aka EFAIL.
The OpenPGP specification allows a Cipher Feedback Mode (CFB) malleability-gadget attack that can indirectly lead to plaintext exfiltration, aka EFAIL.