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CVE-2019-9670

CRITICAL
9.8
CVSS Score
Published: May 29, 2019 at 09:04 PM UTC
Updated: June 17, 2026 at 02:44 AM UTC
2 products affected across 1 vendorZimbra Collaboration SuiteCollaboration

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Severity
CRITICAL9.8
Exploitation
CISA KEV
Exploit prediction
EPSS 100%
SSVC
Active

Actively Exploited

CISA Known Exploited Vulnerabilities (KEV) Catalog

EPSS Score100.0%

EPSS (Exploit Prediction Scoring System) estimates a 100.0% chance this CVE is exploited in the wild within the next 30 days — higher than 100% of all CVEs. It complements CVSS: a high EPSS on a mid-severity CVE can still be urgent.

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

Required Action
Apply updates per vendor instructions.
Ransomware Use
Unknown
Added to KEV
Jan 10, 2022
Remediation Due
Jul 10, 2022
1570 days overdue
Notes
https://nvd.nist.gov/vuln/detail/CVE-2019-9670

Description

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Zimbra Collaboration Suite· Synacor
95%
8.7.0 ≤ v < 8.7.118.7.118.7.11 p18.7.11 p28.7.11 p38.7.11 p48.7.11 p58.7.11 p68.7.11 p78.7.11 p88.7.11 p9
Affected range stops below 8.7.11, so it looks safe — our inference, not a vendor statement
Collaboration· Synacor
75%
8.7.0 ≤ v < 8.7.118.7.118.7.11 p18.7.11 p28.7.11 p38.7.11 p48.7.11 p58.7.11 p68.7.11 p78.7.11 p88.7.11 p9
Affected range stops below 8.7.11, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (7)

x_refsource_MISCExploitThird Party AdvisoryVDB Entry
Source: [email protected]
http://packetstormsecurity.com/files/152487/Zimbra-Collaboration-Autodiscover-Servlet-XXE-ProxyServlet-SSRF.html
x_refsource_MISCThird Party Advisory
Source: [email protected]
http://www.rapid7.com/db/modules/exploit/linux/http/zimbra_xxe_rce
x_refsource_MISCBroken LinkIssue TrackingPatchThird Party Advisory
Source: [email protected]
https://bugzilla.zimbra.com/show_bug.cgi?id=109129
x_refsource_MISCExploitThird Party Advisory
Source: [email protected]
https://isc.sans.edu/forums/diary/CVE20199670+Zimbra+Collaboration+Suite+XXE+vulnerability/27570/
x_refsource_CONFIRMx_refsource_MISCVendor Advisory
Source: [email protected]
https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories
Exploitx_refsource_EXPLOIT-DBThird Party AdvisoryVDB Entry
Source: [email protected]
https://www.exploit-db.com/exploits/46693/
US Government Resource
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-9670

SSVC — Action Prioritization

SSVCActiveAutomatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

9.8CRITICALCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-611

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