All vulnerabilities
CVE-2019-9621

Synacor Zimbra Collaboration Suite (ZCS) Server-Side Request Forgery (SSRF) Vulnerability

Synacor Zimbra Collaboration Suite (ZCS)Applications & CMS
Open in ThreatlineRecord JSON
CVSS
7.5High
ExploitationExploited in the wildAdded to KEV 7 Jul 2025CISA KEV
Exploit odds (EPSS)81.0%Chance of exploitation activity in the next 30 days, higher than 99% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
Federal deadline28 Jul 2025Remediation due date for US federal agenciesCISA KEV
CISA required actionApply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. CISA KEV

What fixes it

No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.

Timeline

  1. 13 Mar 2019Exploit code publicMetasploit
  2. 30 Apr 2019, 17:40 UTCPublishedCVE List
  3. 7 Jul 2025Added to CISA KEVCISA KEV

Public exploit code and templates 8

  • Exploit moduleZimbra Collaboration Autodiscover Servlet XXE and ProxyServlet SSRF 13 Mar 2019Metasploit
  • Webapps exploitZimbra < 8.8.11 - XML External Entity Injection / Server-Side Request Forgery 5 Jun 2019Exploit-DB
  • Webapps exploitZimbra < 8.8.11 - XML External Entity Injection / Server-Side Request Forgery 5 Jun 2019Exploit-DB
  • Remote exploitZimbra Collaboration - Autodiscover Servlet XXE and ProxyServlet SSRF (Metasploit) 12 Apr 2019Exploit-DB
  • Remote exploitZimbra Collaboration - Autodiscover Servlet XXE and ProxyServlet SSRF (Metasploit) 12 Apr 2019Exploit-DB
  • Remote exploitZimbra Collaboration - Autodiscover Servlet XXE and ProxyServlet SSRF (Metasploit) 12 Apr 2019Exploit-DB
  • Remote exploitZimbra Collaboration - Autodiscover Servlet XXE and ProxyServlet SSRF (Metasploit) 12 Apr 2019Exploit-DB
  • Scanner templateZimbra Collaboration Suite - SSRFNuclei

Listed so defenders can prioritize. Threatline links to the source and does not host exploit code.

Description

Synacor Zimbra Collaboration Suite (ZCS) contains a server-side request forgery (SSRF) vulnerability via the ProxyServlet component.

Text from CVE List

Affected versions 1

  • n/aaffected: n/aCVE List

References 8