mailboxd component in Synacor Zimbra Collaboration Suite 8.7.x before 8.7.11p10 has an XML External Entity injection (XXE) vulnerability, as demonstrated by Autodiscover/Autodiscover.xml.
packetstormsecurity.com/files/152487/Zimbra-Collaboration-Autodiscover-Servlet-XXE-ProxyServlet-SSRF.html
www.rapid7.com/db/modules/exploit/linux/http/zimbra_xxe_rce
bugzilla.zimbra.com/show_bug.cgi?id=109129
isc.sans.edu/forums/diary/CVE20199670+Zimbra+Collaboration+Suite+XXE+vulnerability/27570/
wiki.zimbra.com/wiki/Zimbra_Security_Advisories
www.exploit-db.com/exploits/46693/