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,…
- 9.8CriticalCVSS base score
- 100.0%Exploitation in 30 daysEPSS · top 0.1% of all CVEs
- YesKnown exploitedin CISA's KEV since 10 Jan 2022
- 3Public exploitsMetasploit, Nuclei and Exploit-DB
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.
Exploited in the wild
CISA lists this vulnerability in its Known Exploited Vulnerabilities catalog as Synacor Zimbra Collaboration Suite (ZCS) Improper Restriction of XML External Entity Reference.
- Added
- 10 Jan 2022
- Fix due (US federal)
- 10 Jul 2022
- Used by ransomware
- Not known
Apply updates per vendor instructions.
ENISA's EU Vulnerability Database lists it as exploited, from CISA's KEV, since 10 Jan 2022.
Public exploit
An exploit or proof of concept is public: anyone can try it against an unpatched system. The public collections list a Metasploit module, a Nuclei template and an Exploit-DB entry for it. A reference of the record is tagged as an exploit. CISA's SSVC rates its exploitation: it is being exploited.
Show the exploits4
Metasploit modules1 module
- Zimbra Collaboration Autodiscover Servlet XXE and ProxyServlet SSRF (Metasploit module) (opens in a new tab)
exploit/linux/http/zimbra_xxe_rceRank excellentdisclosed 13 Mar 2019
Nuclei templates1 template
- Synacor Zimbra Collaboration <8.7.11p10 - XML External Entity Injection (Nuclei template) (opens in a new tab)
http/cves/2019/CVE-2019-9670.yamlSeverity critical
Exploit-DB1 entry
- Zimbra Collaboration - Autodiscover Servlet XXE and ProxyServlet SSRF (Metasploit) (Exploit-DB entry) (opens in a new tab)
EDB-ID 46693remote, linuxpublished 12 Apr 2019Verified
References tagged exploit1 reference
- 46693 (opens in a new tab)exploitx_refsource_EXPLOIT-DBx_transferred
Modules, templates and exploits as listed by the Metasploit Framework (BSD-3-Clause), ProjectDiscovery's Nuclei templates (MIT) and the Exploit Database (GPLv2), read once a day. Where the data comes from
Timeline
ID reserved
By mitre
- 3 months later
· 3 months later
Published
- 3 years later
· 3 years later
Added to CISA KEV
Known exploited in the wild
- 4 years later
· 4 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Analyzed | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 100.0% · top 0.1% of all CVEs (11 Nov 2026)
- CISA SSVC
- Exploitation: active · Automatable: yes · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Affected products
n/a
- affected n/a
References
References7
- https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories (opens in a new tab)x_refsource_MISCx_transferred
- https://bugzilla.zimbra.com/show_bug.cgi?id=109129 (opens in a new tab)x_refsource_MISCx_transferred
- http://www.rapid7.com/db/modules/exploit/linux/http/zimbra_xxe_rce (opens in a new tab)x_refsource_MISCx_transferred
- http://packetstormsecurity.com/files/152487/Zimbra-Collaboration-Autodiscover-Servlet-XXE-ProxyServlet-SSRF.html (opens in a new tab)x_refsource_MISCx_transferred
- 46693 (opens in a new tab)exploitx_refsource_EXPLOIT-DBx_transferred
- https://isc.sans.edu/forums/diary/CVE20199670+Zimbra+Collaboration+Suite+XXE+vulnerability/27570/ (opens in a new tab)x_refsource_MISCx_transferred
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-9670 (opens in a new tab)government-resource
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- CISA KEV catalog (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2019-19036 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2019-9670)Record last updated .