imap/nntpd.c in the NNTP server (nntpd) for Cyrus IMAPd 2.4.x before 2.4.12 allows remote attackers to bypass authentication by sending an AUTHINFO USER command without sending an additional AUTHINFO PASS command.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.033
EPSS Ranking 87.5%