CVE-2019-9670
CriticalExploitedPublic exploitmailboxd 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.
Published May 29, 2019 · Updated Jul 8, 2026
Key Facts
Patch immediately- CVE-2019-9670 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Zimbra Collaboration Suite (Synacor).
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Jul 16, 2020. Public exploit code is available.
- EPSS estimates a 100% probability of exploitation in the next 30 days.
- Fixed versions are available, including Zimbra Collaboration Suite 8.7.11.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
100%
Higher than 99.9% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2019-9670 brief as a PDF
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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.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Jan 10, 2022 | Jul 10, 2022 | Not reported |
| Industry KEV feed | Jul 16, 2020 | Jul 10, 2022 | Not reported |
| CIRCL KEV | Jan 10, 2022 | Jul 10, 2022 | Not reported |
| ENISA EUVD | Jan 10, 2022 | n/a | Not reported |
Required action: Apply updates per vendor instructions.
Affected Products
11 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Zimbra Collaboration SuiteSynacor | 8.7.11, 8.7.11-p1, 8.7.11-p2, 8.7.11-p3, 8.7.11-p4, 8.7.11-p5, 8.7.11-p6, 8.7.11-p7 | 8.7.11 |
Patched Releases
Zimbra Collaboration Suite
8.7.11
Timeline
Publicly disclosed
May 29, 2019
Added to Industry KEV feed
Jul 16, 2020
Added to CISA KEV
Jan 10, 2022
Added to CIRCL KEV
Jan 10, 2022
Added to ENISA EUVD
Jan 10, 2022
Last updated
Jul 8, 2026
Weakness Type
- CWE-611 Improper Restriction of XML External Entity Reference
References
- advisoryhttps://wiki.zimbra.com/wiki/Zimbra_Security_Advisories
- advisoryhttp://www.rapid7.com/db/modules/exploit/linux/http/zimbra_xxe_rce
- patchhttps://bugzilla.zimbra.com/show_bug.cgi?id=109129
- exploithttp://packetstormsecurity.com/files/152487/Zimbra-Collaboration-Autodiscover-Servlet-XXE-ProxyServlet-SSRF.html
- exploitVulnCheck exploitation report
FAQ
Common Questions.
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: Zimbra Collaboration Suite (Synacor) versions 8.7.11, 8.7.11-p1, 8.7.11-p2, 8.7.11-p3, 8.7.11-p4, 8.7.11-p5, 8.7.11-p6, 8.7.11-p7. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Jul 16, 2020.
Yes. It was added on Jan 10, 2022 with a federal remediation due date of Jul 10, 2022.
Public exploit code is available.
Fixed versions are available, including Zimbra Collaboration Suite 8.7.11.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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