Synacor Zimbra Collaboration Suite (ZCS) Improper Restriction of XML External Entity Reference

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

1. May 29, 2019 · Catalog

   Detected

   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.

2. Jan 10, 2022 · CISA KEV

   Known exploited

   Apply updates per vendor instructions.

3. Jul 10, 2022 · CISA KEV

   Remediation due

   Apply updates per vendor instructions.

4. Jun 16, 2026 · Catalog

   Updated

   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.

Affected

• cpe synacor/zimbra collaboration suiteversion unspecified
• cpe synacor/zimbra collaboration suite8.7.11
• vendor Synacor Zimbra Collaboration Suite (ZCS)version unspecified

Sources

• CISA KEVConfirmed exploitationCVE-2019-9670

  Synacor Zimbra Collaboration Suite (ZCS) contains an improper restriction of XML external entity (XXE) vulnerability in the mailboxd component.

  cisa.gov
• CVE.orgVulnerability recordCVE-2019-9670

  Official CVE identifier

  cve.org
• FIRST EPSSExploitation probabilityCVE-2019-9670

  30-day exploitation probability 100.0%

  first.org
• Exploit DatabasePublic exploit reference46693

  Public archive entry. The exploit body is not stored here.

  exploit-db.com
• Metasploit ModulesPublic exploit moduleexploit_linux/http/zimbra_xxe_rce

  Public module reference (excellent). Module source is not copied into this catalog.

  rapid7.com
• NIST NVDVulnerability recordCVE-2019-9670

  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.

  nvd.nist.gov
• Packet Storm SecurityCited referencehttp://packetstormsecurity.com/files/152487/Zimbra-Collaboration-Autodiscover-Servlet-XXE-ProxyServlet-SSRF.html

  Packet Storm link already published on the finding.

  packetstormsecurity.com

References

• Exploit · packetstormsecurity.com
• Third Party Advisory · rapid7.com
• Broken Link · bugzilla.zimbra.com
• Exploit · isc.sans.edu
• CISA note · nvd.nist.gov
• Vendor Advisory · wiki.zimbra.com
• Exploit · exploit-db.com