Vulnerability Intelligence Report
Synacor Zimbra Collaboration Suite (ZCS) Improper Restriction of XML External Entity Reference
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.
CISA KEV
Nuclei Template
SSVC: Active Exploitation
Automatable
CVSS Base Score
9.8
CRITICAL
Exploitability:3.9
Impact Score:5.9
EPSS Probability:99.99%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-611 ↗CWE-611 Improper Restriction of XML External Entity Reference
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| synacor | zimbra_collaboration_suite | 8.7.11 |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
CISA KEV
ACTIVE IN CATALOG
Nuclei Template
SCANNER AVAILABLE
EPSS Score
99.986%
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | MITRE Corporation · N/A · USA |
| Reserved | 2019-03-11T00:00:00 |
| Published | 2019-05-29T21:04:28 |
| Last Updated | 2025-10-21T23:45:36 |
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