CVE-2020-12846: Unrestricted Upload of File with Dangerous Type

Zimbra before 8.8.15 Patch 10 and 9.x before 9.0.0 Patch 3 allows remote code execution via an avatar file. There is potential abuse of /service/upload servlet in the webmail subsystem. A user can upload executable files exe,sh,bat,jar in the Contact section of the mailbox as an avatar image for ...