Server-side Request Forgery Vulnerability in Zimbra Collaboration Suite
CVE-2019-9621

7.5HIGH

Key Information:

Vendor: Zimbra
Status: Collaboration Server
Vendor: CVE Published:; 30 April 2019

Badges

👾 Exploit Exists🟡 Public PoC🟣 EPSS 91%🦅 CISA Reported

What is CVE-2019-9621?

A server-side request forgery vulnerability exists in the ProxyServlet component of Zimbra Collaboration Suite, affecting various versions prior to specific patches. This flaw allows an attacker to make unauthorized requests from the server to internal services, potentially exposing sensitive information or facilitating other attacks. Administrators are advised to apply the latest patches to mitigate security risks associated with this vulnerability.

CISA has reported CVE-2019-9621

CISA provides regional cyber and physical services to support security and resilience across the United States. CISA monitor the most dangerious vulnerabilities and have identifed CVE-2019-9621 as being exploited but is not known by the CISA to be used in ransomware campaigns. This is subject to change at pace

The CISA's recommendation is: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2019-9621 - Proof of Concept