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ExploitedIn CISA KEVFix available

CVE-2019-9670

Exploitation confirmed. First attested on 2022-01-10 by CISA-ADP, CISA KEV, GCVE · kevintel, GCVE · shadowserver.

  • Published2019-05-29
  • Fixed in8.7.11
  • WeaknessCWE-611

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2019-04-12Exploit-DB entryExploit-DB
  2. 2019-05-2922:29CVE publishedNVD
  3. 2022-01-10Added to the CISA KEV catalogCISA KEV
  4. 2022-01-10Listed as exploited by GCVEGCVE
  5. 2022-01-10Exploitation first reportedCISA KEV
  6. 2025-02-0714:01SSVC exploitation set to activeCISA-ADP

Observed activity

isMalicious corpus · updated 2026-11-04 09:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2019-9670?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2019-9670?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Synacor zimbra collaboration suite
BranchAffectedFixed in
8.7≥ 8.7.0, < 8.7.118.7.11
8.7= 8.7.11no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

  1. Update Synacor zimbra collaboration suite to 8.7.11
  2. CISA’s required action: Apply updates per vendor instructions.due 2022-07-10

Advisories and patches

Detection

read 2026-11-03 22:42 UTC
Nuclei template
available
ProjectDiscovery
Exploit-DB
EDB-46693
Exploit-DB
Proof-of-concept repositories
3 repositories, unverifiedrek7/Zimbra-RCEattackgithub/Zimbra-RCECappricio-Securities/CVE-2019-9670
PoC-in-GitHub
Metasploit modules
1 moduleexploit/linux/http/zimbra_xxe_rcerank: excellentModule metadata: Metasploit Framework, © Rapid7, Inc., BSD-3-Clause.
Metasploit Framework

CISA Known Exploited Vulnerability

Date Added
2022-01-10
Patch Due Date
2022-07-10
Ransomware Use
Unknown
Required Action
Apply updates per vendor instructions.

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2019-05-29
Last Modified
2026-06-17
NVD status
Analyzed
GitHub Advisory
GHSA-pj74-pf28-5qjw

Frequently asked questions

What is 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.

Is CVE-2019-9670 actively exploited?

Yes. CVE-2019-9670 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2022-07-10.

What is the CVSS score for CVE-2019-9670?

CVE-2019-9670 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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