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    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.

    Published:Apr 30, 2019
    Last Modified:Nov 4, 2025
    EPS:Apr 30, 2019
    EPSS Score:0.94042
    CVSS Score:7.5

    CISA Notification

    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.

    Required Action:

    Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

    Notes:

    No extra notes provided.

    Due Date
    Jul 28, 2025
    410 days ago
    Alert Date
    Jul 7, 2025
    431 days ago

    Affected Products

    Vendor
    Synacor
    Product
    Zimbra Collaboration Suite

    Exploits

    http://packetstormsecurity.com/files/152487/Zimbra-Collaboration-Autodiscover-Servlet-XXE-ProxyServlet-SSRF.htmlhttp://packetstormsecurity.com/files/153190/Zimbra-XML-Injection-Server-Side-Request-Forgery.htmlhttp://www.rapid7.com/db/modules/exploit/linux/http/zimbra_xxe_rcehttps://www.exploit-db.com/exploits/46693/http://packetstormsecurity.com/files/152487/Zimbra-Collaboration-Autodiscover-Servlet-XXE-ProxyServlet-SSRF.htmlhttp://packetstormsecurity.com/files/153190/Zimbra-XML-Injection-Server-Side-Request-Forgery.htmlhttp://www.rapid7.com/db/modules/exploit/linux/http/zimbra_xxe_rcehttps://www.exploit-db.com/exploits/46693/https://www.exploit-db.com/exploits/46967https://github.com/k8gege/ZimbraExploithttps://www.exploit-db.com/exploits/46693

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-664 Server Side Request Forgery

    Related CVEs

    CVE-2026-73576 (CVSS 6.3) — In Zimbra Collaboration (ZCS) before 10.1.17, weak cryptographic key generation vulnerability exists in the On…
    CVE-2026-73575 (CVSS 3.1) — In Zimbra Collaboration (ZCS) before 10.1.17, a Cross-Site Request Forgery (CSRF) vulnerability exists in the …
    CVE-2026-73574 (CVSS 3.1) — In Zimbra Collaboration before 10.1.17, a local file inclusion (LFI) vulnerability exists in the Zimbra Classi…
    CVE-2026-73573 (CVSS 3.1) — In Zimbra Collaboration (ZCS) before 10.1.17, a path traversal vulnerability exists in the Zimbra Briefcase do…
    CVE-2026-73572 (CVSS 6.1) — In Zimbra Collaboration (ZCS) before 10.1.17, a stored cross-site scripting (XSS) vulnerability exists in the …
    CVE-2026-73571 (CVSS 3.1) — An authorization bypass vulnerability exists in Zimbra Collaboration (ZCS) before 10.1.17 due to improper auth…
    CVE-2026-73570 (CVSS 8.9) — A remote code execution vulnerability exists in Zimbra Collaboration (ZCS) before 10.1.20 when the optional zi…
    CVE-2026-33373 (CVSS 8.8) — An issue was discovered in Zimbra Collaboration (ZCS) 10.0 and 10.1. A Cross-Site Request Forgery (CSRF) vulne…
    CVE-2026-33372 (CVSS 5.4) — An issue was discovered in Zimbra Collaboration (ZCS) 10.0 and 10.1. A cross-site request forgery (CSRF) vulne…
    CVE-2026-33370 (CVSS 6.1) — An issue was discovered in Zimbra Collaboration (ZCS) 10.0 and 10.1. A stored cross-site scripting (XSS) vulne…

    References

    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

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High