An issue was discovered in Mutt before 1.10.1 and NeoMutt before 2018-07-16. imap/util.c mishandles ".." directory traversal in a mailbox name.

An issue was discovered in NeoMutt before 2018-07-16. newsrc.c does not properly restrict '/' characters that may have unsafe interaction with cache pathnames.

An issue was discovered in Mutt before 1.10.1 and NeoMutt before 2018-07-16. imap/message.c has a stack-based buffer overflow for a FETCH response with a long INTERNALDATE field.

An issue was discovered in Mutt before 1.10.1 and NeoMutt before 2018-07-16. imap/message.c has a stack-based buffer overflow for a FETCH response with a long RFC822.SIZE field.

An issue was discovered in Mutt before 1.10.1 and NeoMutt before 2018-07-16. pop.c does not forbid characters that may have unsafe interaction with message-cache pathnames, as demonstrated by a '/' character.

An issue was discovered in Mutt before 1.10.1 and NeoMutt before 2018-07-16. pop.c mishandles a zero-length UID.

An issue was discovered in NeoMutt before 2018-07-16. nntp.c proceeds even if memory allocation fails for messages data.

An issue was discovered in NeoMutt before 2018-07-16. nntp_add_group in newsrc.c has a stack-based buffer overflow because of incorrect sscanf usage.

An issue was discovered in Mutt before 1.10.1 and NeoMutt before 2018-07-16. They have a buffer overflow via base64 data.

An issue was discovered in Mutt before 1.10.1 and NeoMutt before 2018-07-16. They allow remote IMAP servers to execute arbitrary commands via backquote characters, related to the mailboxes command associated with an automatic subscription.