Description
An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. The vacation -fcc- feature skips the destination-mailbox ACL. A user whose vacation Sieve script used :fcc (to save a copy of the sent message) could deliver vacation auto-reply copies into any mailbox the script could name, regardless of whether the script owner had insert permissions on the destination mailbox.
CVSS 5.4EPSS 0.196%Risk 0.55
View source- Published
- 2026-07-16 19:16:48
- Affected versions
- <=3.12.2
- Type
- Critical software
- Vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L