CVE-2019-9621

HIGHNVD 7.59.0▲Trending — 4 sources updated this weekExploited in the wild

7.5

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.

CVSS v3: 7.5
EG Score: 9.0(high)
EPSS: 99.9%
KEV: ⚠ Exploited

Published

April 30, 2019

Last Modified

November 4, 2025

References (19)

cve@mitrehttp://packetstormsecurity.com/files/152487/Zimbra-Collaboration-Autodiscover-Servlet-XXE-ProxyServlet-SSRF.html
cve@mitrehttp://packetstormsecurity.com/files/153190/Zimbra-XML-Injection-Server-Side-Request-Forgery.html
cve@mitrehttp://www.rapid7.com/db/modules/exploit/linux/http/zimbra_xxe_rce
cve@mitrehttps://blog.tint0.com/2019/03/a-saga-of-code-executions-on-zimbra.html
cve@mitrehttps://blog.zimbra.com/2019/03/9826/
cve@mitrehttps://bugzilla.zimbra.com/show_bug.cgi?id=109127
cve@mitrehttps://wiki.zimbra.com/wiki/Security_Center
cve@mitrehttps://wiki.zimbra.com/wiki/Zimbra_Security_Advisories
cve@mitrehttps://www.exploit-db.com/exploits/46693/
af854a3a-2127-422b-91ae-364da2661108http://packetstormsecurity.com/files/152487/Zimbra-Collaboration-Autodiscover-Servlet-XXE-ProxyServlet-SSRF.html
af854a3a-2127-422b-91ae-364da2661108http://packetstormsecurity.com/files/153190/Zimbra-XML-Injection-Server-Side-Request-Forgery.html
af854a3a-2127-422b-91ae-364da2661108http://www.rapid7.com/db/modules/exploit/linux/http/zimbra_xxe_rce
af854a3a-2127-422b-91ae-364da2661108https://blog.tint0.com/2019/03/a-saga-of-code-executions-on-zimbra.html
af854a3a-2127-422b-91ae-364da2661108https://blog.zimbra.com/2019/03/9826/
af854a3a-2127-422b-91ae-364da2661108https://bugzilla.zimbra.com/show_bug.cgi?id=109127

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-918Server-Side Request Forgery (SSRF)

Data Freshness Timeline

(refreshed 20× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-03 22:19 UTCEG score recompute
2026-06-03 22:19 UTCGHSA enrichment
2026-06-03 19:09 UTCkev_newly_listed
2026-06-03 18:27 UTCEG score recompute
2026-06-03 18:27 UTCGHSA enrichment
2026-06-03 14:35 UTCEG score recompute
2026-06-03 14:35 UTCGHSA enrichment
2026-06-03 10:43 UTCEG score recompute
2026-06-03 10:43 UTCGHSA enrichment
2026-06-03 06:51 UTCEG score recompute
2026-06-03 06:51 UTCGHSA enrichment
2026-06-03 02:59 UTCEG score recompute
2026-06-03 02:59 UTCGHSA enrichment
2026-06-02 23:07 UTCEG score recompute
2026-06-02 23:07 UTCGHSA enrichment
2026-06-02 19:15 UTCEG score recompute
2026-06-02 19:15 UTCGHSA enrichment
2026-06-02 18:32 UTCkev_newly_listed
2026-06-02 15:23 UTCEG score recompute
2026-06-02 15:23 UTCGHSA enrichment

Publicly available exploits

(5 references)

Working exploit code is in the public domain (1 Metasploit module) (1 GitHub PoC) (2 Exploit-DB entries). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

Exploit-DBEDB-46967
First seen Jun 5, 2019
Zimbra < 8.8.11 - XML External Entity Injection / Server-Side Request Forgery
Open source ↗
GitHub PoCk8gege/ZimbraExploit
First seen May 6, 2019
Zimbra邮件系统漏洞 XXE/RCE/SSRF/Upload GetShell Exploit 1. (CVE-2019-9621 Zimbra<8.8.11 XXE GetShell Exploit)
Open source ↗
Exploit-DBEDB-46693✓ verified
First seen Apr 12, 2019
Zimbra Collaboration - Autodiscover Servlet XXE and ProxyServlet SSRF (Metasploit)
Open source ↗
Metasploitexploit/linux/http/zimbra_xxe_rce✓ verified
First seen Mar 13, 2019
Zimbra Collaboration Autodiscover Servlet XXE and ProxyServlet SSRF
Open source ↗
Nucleihttp/cves/2019/CVE-2019-9621.yaml
First seen Jan 1, 2019
Zimbra Collaboration Suite - SSRF
Open source ↗

Frequently asked(6)

What is CVE-2019-9621?

CVE-2019-9621 is a high vulnerability published on April 30, 2019. 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.

When was CVE-2019-9621 disclosed?

CVE-2019-9621 was first published in the National Vulnerability Database on April 30, 2019, with the most recent update on November 4, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2019-9621 actively exploited?

Yes. CISA added CVE-2019-9621 to the Known Exploited Vulnerabilities catalog on July 7, 2025, affecting Synacor Zimbra Collaboration Suite (ZCS). KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.

What is the CVSS score of CVE-2019-9621?

CVE-2019-9621 has a CVSS v3 base score of 7.5 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.

Which products are affected by CVE-2019-9621?

CVE-2019-9621 affects Synacor Zimbra Collaboration Suite (ZCS). The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.

How do I remediate CVE-2019-9621?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2019-9621, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2019-9621

📅 Published

🔄 Last Modified

🔗 References (19)

Weakness Classification(1)

Data Freshness Timeline

Publicly available exploits

❓ Frequently asked(6)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2019-9621?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (19)

Frequently asked(6)

Related CVEs(same CWE)