OX App Suite before 7.10.6-rev30 allows SSRF because e-mail account discovery disregards the deny-list and thus can be attacked by an adversary who controls the DNS records of an external domain (found in the host part of an e-mail address).
OX App Suite through 7.10.6 allows XSS via XHTML CDATA for a snippet, as demonstrated by the onerror attribute of an IMG element within an e-mail signature.