CVE-2019-9621Zimbra Collaboration Suite before 8.6 patch 13, 8.7.x before 8.7.11 patch 10, and 8.8.x before 8.8.10 patch 7 or 8.8.x before 8.8.11 patch…
- 7.5HighCVSS base score
- 81.0%Exploitation in 30 daysEPSS · top 0.4% of all CVEs
- YesKnown exploitedin CISA's KEV since 7 Jul 2025
- 4Public exploitsMetasploit, Nuclei and Exploit-DB
Description
Zimbra Collaboration Suite before 8.6 patch 13, 8.7.x before 8.7.11 patch 10, and 8.8.x before 8.8.10 patch 7 or 8.8.x before 8.8.11 patch 3 allows SSRF via the ProxyServlet component.
Exploited in the wild
CISA lists this vulnerability in its Known Exploited Vulnerabilities catalog as Synacor Zimbra Collaboration Suite (ZCS) Server-Side Request Forgery (SSRF) Vulnerability.
- Added
- 7 Jul 2025
- Fix due (US federal)
- 28 Jul 2025
- Used by ransomware
- Not known
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
ENISA's EU Vulnerability Database lists it as exploited, from CISA's KEV, since 7 Jul 2025.
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 2 Exploit-DB entries for it. A reference of the record is tagged as an exploit. CISA's SSVC rates its exploitation: it is being exploited.
Show the exploits5
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
- Zimbra Collaboration Suite - SSRF (Nuclei template) (opens in a new tab)
http/cves/2019/CVE-2019-9621.yamlSeverity high
Exploit-DB2 entries
- Zimbra < 8.8.11 - XML External Entity Injection / Server-Side Request Forgery (Exploit-DB entry) (opens in a new tab)
EDB-ID 46967webapps, jsppublished 5 Jun 2019Not verified
- 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
- 55 days later
· 55 days later
Published
- 6 years later
· 6 years later
Added to CISA KEV
Known exploited in the wild
- 4 months later
· 4 months 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 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| NVDNVD · Analyzed | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
- EPSS (exploitation in 30 days)
- 81.0% · top 0.4% of all CVEs (15 Nov 2026)
- CISA SSVC
- Exploitation: active · Automatable: yes · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Affected products
n/a
- affected n/a
References
References10
- https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://wiki.zimbra.com/wiki/Security_Center (opens in a new tab)x_refsource_MISCx_transferred
- https://bugzilla.zimbra.com/show_bug.cgi?id=109127 (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://blog.zimbra.com/2019/03/9826/ (opens in a new tab)x_refsource_MISCx_transferred
- https://blog.tint0.com/2019/03/a-saga-of-code-executions-on-zimbra.html (opens in a new tab)x_refsource_MISCx_transferred
- http://packetstormsecurity.com/files/153190/Zimbra-XML-Injection-Server-Side-Request-Forgery.html (opens in a new tab)x_refsource_MISCx_transferred
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-9621 (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-2019-18992 (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-2019-9621)Record last updated .