The postjournal service in Zimbra Collaboration (ZCS) before 8.8.15 Patch 46, 9 before 9.0.0 Patch 41, 10 before 10.0.9, and 10.1 before 10.1.1 sometimes allows unauthenticated users to execute commands.
https://thehackernews.com/2024/10/researchers-sound-alarm-on-active.html
https://www.darkreading.com/cyberattacks-data-breaches/recent-zimbra-rce-under-attack-patch-now
https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories
https://wiki.zimbra.com/wiki/Zimbra_Responsible_Disclosure_Policy
https://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P41#Security_Fixes
https://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P46#Security_Fixes
https://wiki.zimbra.com/wiki/Zimbra_Releases/10.1.1#Security_Fixes
https://wiki.zimbra.com/wiki/Zimbra_Releases/10.0.9#Security_Fixes