Zoom Call Recording 6.3.1 from Eleveo is vulnerable to Java Deserialization attacks targeting the inbuilt RMI service. A remote unauthenticated attacker can exploit this vulnerability by sending crafted RMI requests to execute arbitrary code on the target host.

A privilege escalation vulnerability in ZOOM Call Recording 6.3.1 allows its user account (i.e., the account under which the program runs - by default, the callrec account) to elevate privileges to root by abusing the callrec-rs@.service. The callrec-rs@.service starts the /opt/callrec/bin/rs binary with root privileges, and this binary is owned by callrec. It can be replaced by a Trojan horse.

ZOOM International Call Recording 6.3.1 suffers from multiple authenticated stored XSS vulnerabilities via the phoneNumber field in the (1) User Edit or (2) User Add form, (3) name field in the Role Add form, (4) name or number field in the Edit Group form, (5) tagKey or tagValue field in the Recording Rules Configuration, or (6) txt69735:/VemailAddress/value or txt75767:/VemailFrom/value field in callrec/config.