CVE-2019-9621

HIGHNVD 7.59.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2025-07-07), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 7.5 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 4 sources updated this weekExploited in the wild
7.5
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS: 81%CVSS: 7.5Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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)
EG Risk
96(Attend)
EG Risk 96/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity90% × 45%
Exploitation100% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS
99.6%
KEV
⚠ Exploited

Published

April 30, 2019

Last Modified

November 4, 2025

Advisory Details (9)

Auto-updated Jun 6, 2026
⚠️ Active exploitation confirmed. No patch confirmed yet.
generic

Packet Storm

http://packetstormsecurity.com/files/152487/Zimbra-Collaboration-Autodiscover-Servlet-XXE-ProxyServlet-SSRF.html
generic🟡 PoC Available

Zimbra Collaboration - Autodiscover Servlet XXE and ProxyServlet SSRF (Metasploit) - Linux remote Exploit

https://www.exploit-db.com/exploits/46693/
generic

Zimbra Security Advisories - Zimbra :: Tech Center

https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories
generic🔴 Active Exploitation

Security Center - Zimbra :: Tech Center

https://wiki.zimbra.com/wiki/Security_Center
generic

109127 – SSRF vulnerability - ProxyServlet [CWE-918 / CWE-807]

https://bugzilla.zimbra.com/show_bug.cgi?id=109127
generic

[REPOST] Recent Zimbra XXE / SSRF Vulnerability Disclosure - Zimbra : Blog

https://blog.zimbra.com/2019/03/9826/
generic🔴 Active Exploitation

An Trinh's past works: A Saga of Code Executions on Zimbra

https://blog.tint0.com/2019/03/a-saga-of-code-executions-on-zimbra.html
generic

Rapid7 Vulnerability Database

http://www.rapid7.com/db/modules/exploit/linux/http/zimbra_xxe_rce
generic

Packet Storm

http://packetstormsecurity.com/files/153190/Zimbra-XML-Injection-Server-Side-Request-Forgery.html

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 58× in last 7d / 222× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 392 total refreshes for this CVE.

  1. 2026-07-23 01:47 UTCEG score recompute
  2. 2026-07-23 00:07 UTCEG score recompute
  3. 2026-07-23 00:07 UTCGHSA enrichment
  4. 2026-07-22 22:30 UTCEG score recompute
  5. 2026-07-22 20:12 UTCGHSA enrichment
  6. 2026-07-22 19:40 UTCCISA KEV update
  7. 2026-07-22 16:17 UTCEG score recompute
  8. 2026-07-22 16:16 UTCGHSA enrichment
  9. 2026-07-22 14:05 UTCEPSS rescore
  10. 2026-07-22 12:19 UTCGHSA enrichment
  11. 2026-07-22 08:25 UTCGHSA enrichment
  12. 2026-07-22 04:33 UTCGHSA enrichment
  13. 2026-07-22 00:31 UTCGHSA enrichment
  14. 2026-07-21 19:47 UTCGHSA enrichment
  15. 2026-07-21 15:54 UTCEG score recompute
  16. 2026-07-21 15:54 UTCGHSA enrichment
  17. 2026-07-21 15:22 UTCEPSS rescore
  18. 2026-07-21 15:22 UTCEPSS rescore
  19. 2026-07-21 14:37 UTCCISA KEV update
  20. 2026-07-21 12:00 UTCGHSA enrichment
  21. 2026-07-21 08:05 UTCGHSA enrichment
  22. 2026-07-21 04:12 UTCGHSA enrichment
  23. 2026-07-21 00:16 UTCGHSA enrichment
  24. 2026-07-20 20:22 UTCGHSA enrichment
  25. 2026-07-20 16:29 UTCGHSA enrichment
Show 75 more
  1. 2026-07-20 12:36 UTCGHSA enrichment
  2. 2026-07-20 08:44 UTCGHSA enrichment
  3. 2026-07-20 04:51 UTCGHSA enrichment
  4. 2026-07-20 00:59 UTCGHSA enrichment
  5. 2026-07-19 21:06 UTCGHSA enrichment
  6. 2026-07-19 17:14 UTCEG score recompute
  7. 2026-07-19 17:14 UTCGHSA enrichment
  8. 2026-07-19 14:28 UTCEPSS rescore
  9. 2026-07-19 14:28 UTCEPSS rescore
  10. 2026-07-19 13:22 UTCGHSA enrichment
  11. 2026-07-19 09:30 UTCGHSA enrichment
  12. 2026-07-19 05:37 UTCGHSA enrichment
  13. 2026-07-19 01:45 UTCGHSA enrichment
  14. 2026-07-18 21:51 UTCGHSA enrichment
  15. 2026-07-18 17:58 UTCGHSA enrichment
  16. 2026-07-18 14:05 UTCGHSA enrichment
  17. 2026-07-18 10:12 UTCGHSA enrichment
  18. 2026-07-18 06:19 UTCGHSA enrichment
  19. 2026-07-18 02:27 UTCGHSA enrichment
  20. 2026-07-17 22:35 UTCGHSA enrichment
  21. 2026-07-17 18:43 UTCGHSA enrichment
  22. 2026-07-17 14:51 UTCGHSA enrichment
  23. 2026-07-17 10:57 UTCGHSA enrichment
  24. 2026-07-17 07:05 UTCEG score recompute
  25. 2026-07-17 07:05 UTCGHSA enrichment
  26. 2026-07-17 03:12 UTCGHSA enrichment
  27. 2026-07-16 23:20 UTCGHSA enrichment
  28. 2026-07-16 19:27 UTCGHSA enrichment
  29. 2026-07-16 17:04 UTCCISA KEV update
  30. 2026-07-16 15:34 UTCGHSA enrichment
  31. 2026-07-16 11:41 UTCGHSA enrichment
  32. 2026-07-16 07:48 UTCGHSA enrichment
  33. 2026-07-16 03:56 UTCGHSA enrichment
  34. 2026-07-16 00:04 UTCGHSA enrichment
  35. 2026-07-15 20:11 UTCGHSA enrichment
  36. 2026-07-15 16:55 UTCEPSS rescore
  37. 2026-07-15 16:49 UTCCISA KEV update
  38. 2026-07-15 16:18 UTCGHSA enrichment
  39. 2026-07-15 15:04 UTCCISA KEV update
  40. 2026-07-15 12:26 UTCGHSA enrichment
  41. 2026-07-15 08:34 UTCGHSA enrichment
  42. 2026-07-15 04:42 UTCGHSA enrichment
  43. 2026-07-15 00:49 UTCGHSA enrichment
  44. 2026-07-14 20:56 UTCGHSA enrichment
  45. 2026-07-14 18:05 UTCCISA KEV update
  46. 2026-07-14 17:04 UTCGHSA enrichment
  47. 2026-07-14 13:12 UTCGHSA enrichment
  48. 2026-07-14 09:19 UTCGHSA enrichment
  49. 2026-07-14 05:26 UTCGHSA enrichment
  50. 2026-07-14 01:34 UTCGHSA enrichment
  51. 2026-07-13 21:42 UTCGHSA enrichment
  52. 2026-07-13 17:49 UTCGHSA enrichment
  53. 2026-07-13 17:07 UTCCISA KEV update
  54. 2026-07-13 13:56 UTCGHSA enrichment
  55. 2026-07-13 10:04 UTCGHSA enrichment
  56. 2026-07-13 06:05 UTCGHSA enrichment
  57. 2026-07-13 02:12 UTCGHSA enrichment
  58. 2026-07-12 22:20 UTCGHSA enrichment
  59. 2026-07-12 18:28 UTCGHSA enrichment
  60. 2026-07-12 14:34 UTCGHSA enrichment
  61. 2026-07-12 10:42 UTCGHSA enrichment
  62. 2026-07-12 06:50 UTCGHSA enrichment
  63. 2026-07-12 05:44 UTCEPSS rescore
  64. 2026-07-12 05:43 UTCEPSS rescore
  65. 2026-07-12 02:58 UTCGHSA enrichment
  66. 2026-07-11 23:06 UTCGHSA enrichment
  67. 2026-07-11 19:14 UTCGHSA enrichment
  68. 2026-07-11 15:22 UTCGHSA enrichment
  69. 2026-07-11 11:29 UTCGHSA enrichment
  70. 2026-07-11 07:37 UTCGHSA enrichment
  71. 2026-07-11 03:44 UTCGHSA enrichment
  72. 2026-07-10 23:52 UTCGHSA enrichment
  73. 2026-07-10 20:00 UTCGHSA enrichment
  74. 2026-07-10 17:52 UTCCISA KEV update
  75. 2026-07-10 16:08 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 ↗

Related CVEs(same CWE)

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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