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CVE-2019-9621

97
FAUCET Score

CVE-2019-9621 is a critical Server-Side Request Forgery (SSRF) vulnerability affecting Zimbra Collaboration Suite versions prior to 8.6 patch 13, 8.7.11 patch 10, and 8.8.11 patch 3, specifically through the ProxyServlet component. This vulnerability carries a high CVSS score of 7.5, indicating a severe risk with a network-based attack vector requiring no user interaction, potentially leading to unauthorized information disclosure. It is actively exploited in the wild, listed in CISA's KEV catalog, and has publicly available exploit modules in Metasploit and Nuclei templates, as well as mentions on ExploitDB. The high EPSS score and community discussion further underscore its significant threat and active attention from security researchers.

Impacted Technologies

VendorProductVersion(s)CPE
< 8.6.0CPE matchmatch criteria
cpe:2.3:a:synacor:zimbra_collaboration_suite:*:*:*:*:*:*:*:*
>= 8.7.0, < 8.7.11CPE matchmatch criteria
cpe:2.3:a:synacor:zimbra_collaboration_suite:*:*:*:*:*:*:*:*
>= 8.8.0, < 8.8.9CPE matchmatch criteria
cpe:2.3:a:synacor:zimbra_collaboration_suite:*:*:*:*:*:*:*:*
8.6.0CPE matchmatch criteria
cpe:2.3:a:synacor:zimbra_collaboration_suite:8.6.0:-:*:*:*:*:*:*
8.6.0CPE matchmatch criteria
cpe:2.3:a:synacor:zimbra_collaboration_suite:8.6.0:patch1:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
80.91%
Probability of exploitation in next 30 days
EPSS Percentile
99.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
Added to KEV · Jul 7, 2025
Metasploit: Zimbra Collaboration Autodiscover Servlet XXE and ProxyServlet SSRF · Mar 13, 2019
Nuclei: CVE-2019-9621 · Sep 26, 2025
ExploitDB: EDB-46967 · Jun 5, 2019
This CVE's current EPSS score of 0.8091 is in the 99th percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Remediation records are not available for this CVE.

References

cisa.gov / known-exploited-vulnerabilities-catalog
US Government Resource
packetstormsecurity.com / files/152487/Zimbra-Collaboration-Autodiscover-Servlet-XXE-ProxyServlet-SSRF.html
ExploitThird Party AdvisoryVDB Entry
packetstormsecurity.com / files/153190/Zimbra-XML-Injection-Server-Side-Request-Forgery.html
ExploitThird Party AdvisoryVDB Entry
blog.tint0.com / 2019/03/a-saga-of-code-executions-on-zimbra.html
Third Party Advisory
blog.zimbra.com / 2019/03/9826
Vendor Advisory
bugzilla.zimbra.com / show_bug.cgi
Issue Tracking
wiki.zimbra.com / wiki/Security_Center
Release NotesVendor Advisory
wiki.zimbra.com / wiki/Zimbra_Security_Advisories
Vendor Advisory
exploit-db.com / exploits/46693
ExploitThird Party AdvisoryVDB Entry
rapid7.com / db/modules/exploit/linux/http/zimbra_xxe_rce
ExploitThird Party Advisory