CVE-2019-9621

Name: CVE-2019-9621
Creator: NVD / NIST
Published: 2019-04-30T18:29:08.633+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10Actively ExploitedEPSS 80.91%

Last modified Jun 17, 2026

CVE-2019-9621 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. CISA has confirmed active exploitation in the wild. EPSS estimates a 80.91% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS Probability

80.91%

99.6th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by Jul 28, 2025.

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Synacor	Zimbra Collaboration Suite	< 8.6.0
Synacor	Zimbra Collaboration Suite	>= 8.7.0, < 8.7.11
Synacor	Zimbra Collaboration Suite	>= 8.8.0, < 8.8.9
Synacor	Zimbra Collaboration Suite	8.6.0
Synacor	Zimbra Collaboration Suite	8.7.11
Synacor	Zimbra Collaboration Suite	8.8.9
Synacor	Zimbra Collaboration Suite	8.8.10
Synacor	Zimbra Collaboration Suite	8.8.11

References

http://packetstormsecurity.com/files/152487/Zimbra-Collaboration-Autodiscover-Servlet-XXE-ProxyServlet-SSRF.htmlExploit, Third Party Advisory, VDB Entry
http://packetstormsecurity.com/files/153190/Zimbra-XML-Injection-Server-Side-Request-Forgery.htmlExploit, Third Party Advisory, VDB Entry
http://www.rapid7.com/db/modules/exploit/linux/http/zimbra_xxe_rceExploit, Third Party Advisory
https://blog.tint0.com/2019/03/a-saga-of-code-executions-on-zimbra.htmlThird Party Advisory
https://blog.zimbra.com/2019/03/9826/Vendor Advisory
https://bugzilla.zimbra.com/show_bug.cgi?id=109127Issue Tracking
https://wiki.zimbra.com/wiki/Security_CenterRelease Notes, Vendor Advisory
https://wiki.zimbra.com/wiki/Zimbra_Security_AdvisoriesVendor Advisory
https://www.exploit-db.com/exploits/46693/Exploit, Third Party Advisory, VDB Entry
http://packetstormsecurity.com/files/152487/Zimbra-Collaboration-Autodiscover-Servlet-XXE-ProxyServlet-SSRF.htmlExploit, Third Party Advisory, VDB Entry
http://packetstormsecurity.com/files/153190/Zimbra-XML-Injection-Server-Side-Request-Forgery.htmlExploit, Third Party Advisory, VDB Entry
http://www.rapid7.com/db/modules/exploit/linux/http/zimbra_xxe_rceExploit, Third Party Advisory
https://blog.tint0.com/2019/03/a-saga-of-code-executions-on-zimbra.htmlThird Party Advisory
https://blog.zimbra.com/2019/03/9826/Vendor Advisory
https://bugzilla.zimbra.com/show_bug.cgi?id=109127Issue Tracking
https://wiki.zimbra.com/wiki/Security_CenterRelease Notes, Vendor Advisory
https://wiki.zimbra.com/wiki/Zimbra_Security_AdvisoriesVendor Advisory
https://www.exploit-db.com/exploits/46693/Exploit, Third Party Advisory, VDB Entry
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-9621US Government Resource

Timeline

Published: Apr 30, 2019
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2019-9621?

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.

How severe is CVE-2019-9621?

CVE-2019-9621 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 80.91% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2019-9621?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-9621?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST