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Servers and applications

CVE-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.

Actively exploited: CISA added it to its Known Exploited Vulnerabilities catalog on 10 Jan 2022.

Severity
Critical 9.8
Published
29 May 2019
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
8.7.11
Exploit chance
100% in the next 30 daysHigher than 99% of CVEs. EPSS by FIRST, 10 Nov 2026
Sources
NVD

Affected software

SoftwareAffected versions
Zimbra CollaborationServers and applications · cpe:a:synacor:zimbra_collaboration_suite
  • Version 8.7.11-p9
  • Version 8.7.11-p8
  • Version 8.7.11-p7
  • Version 8.7.11-p6
All 11 release lines
  • From 8.7.0 before 8.7.11
  • Version 8.7.11
  • Version 8.7.11-p1
  • Version 8.7.11-p2
  • Version 8.7.11-p3
  • Version 8.7.11-p4
  • Version 8.7.11-p5
  • Version 8.7.11-p6
  • Version 8.7.11-p7
  • Version 8.7.11-p8
  • Version 8.7.11-p9

Known exploited

CISA name
Synacor Zimbra Collaboration Suite (ZCS) Improper Restriction of XML External Entity Reference
Required action
Apply updates per vendor instructions.
Due for US agencies
10 Jul 2022
Used in ransomware
Not known

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2019-9670
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2019-9670