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.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- Puntuación base: 7.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 81%
- Percentil entre todas las CVEs puntuadas: 100
- Fecha de la puntuación: 5/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
CISA KEV — explotada activamente
- Añadida al catálogo: 7/7/2025
- Plazo de remediación: 28/7/2025
- Uso conocido en ransomware: Unknown
🎯 Técnicas ATT&CK
Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.
- Explotación
T1190Exploit Public-Facing Applicationinitial access85 % - Impacto principal
T1090Proxycommand and control90 %
Vulnerabilidad SSRF en ProxyServlet (CWE-918) accesible remotamente sin autenticación (AV:N/PR:N). Permite acceso indirecto a recursos internos mediante proxy.
Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.
🛡️ Mitigaciones ATT&CK que cubren estas técnicas
Tecnologías afectadas (1)
CWE
- CWE-918
- CWE-918
Referencias
- http://packetstormsecurity.com/files/152487/Zimbra-Collaboration-Autodiscover-Servlet-XXE-ProxyServlet-SSRF.html
- http://packetstormsecurity.com/files/153190/Zimbra-XML-Injection-Server-Side-Request-Forgery.html
- http://www.rapid7.com/db/modules/exploit/linux/http/zimbra_xxe_rce
- https://blog.tint0.com/2019/03/a-saga-of-code-executions-on-zimbra.html
- https://blog.zimbra.com/2019/03/9826/
- https://bugzilla.zimbra.com/show_bug.cgi?id=109127
- https://wiki.zimbra.com/wiki/Security_Center
- https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories
- https://www.exploit-db.com/exploits/46693/
- http://packetstormsecurity.com/files/152487/Zimbra-Collaboration-Autodiscover-Servlet-XXE-ProxyServlet-SSRF.html
- http://packetstormsecurity.com/files/153190/Zimbra-XML-Injection-Server-Side-Request-Forgery.html
- http://www.rapid7.com/db/modules/exploit/linux/http/zimbra_xxe_rce
- https://blog.tint0.com/2019/03/a-saga-of-code-executions-on-zimbra.html
- https://blog.zimbra.com/2019/03/9826/
- https://bugzilla.zimbra.com/show_bug.cgi?id=109127
- https://wiki.zimbra.com/wiki/Security_Center
- https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories
- https://www.exploit-db.com/exploits/46693/
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-9621
JSON original (NVD)
Mostrar
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"criteria": "cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.10:patch4:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "C3A4D1E3-D075-46DF-BA0A-C343992559FC"
},
{
"criteria": "cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.10:patch6:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "94FBCF3B-BF84-40B3-9FE3-B4F87144E06E"
},
{
"criteria": "cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.10:patch7:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "212959A7-A966-43EC-801A-35C4AF617CF4"
},
{
"criteria": "cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.11:-:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "A0B38B6A-83D3-4983-A4E7-4A1418C3F0D9"
},
{
"criteria": "cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.11:patch1:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "7E0EA919-7260-4878-88A7-53AD15649634"
},
{
"criteria": "cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.11:patch2:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "D586F989-0EDD-40D3-B839-CEE9BC56999A"
},
{
"criteria": "cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.11:patch3:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "7E11310D-3A18-47B2-836F-75B205032AF3"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "cve@mitre.org",
"cisaRequiredAction": "Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.",
"cisaVulnerabilityName": "Synacor Zimbra Collaboration Suite (ZCS) Server-Side Request Forgery (SSRF) Vulnerability"
}