An unauthenticated attacker with network access can exploit this SSRF to achieve several malicious objectives:
Because of insufficient input validation, a remote, unauthenticated attacker can send a specially crafted HTTP request to the server. This tricks the server into making further requests to other internal or external systems on the attacker's behalf. Why is this Dangerous? Unauthorized Access cve20207796 zimbra collaboration suite full
The vulnerability stems from this extraction process. In vulnerable versions, the extraction utility fails to validate the file paths specified within the archive. An attacker can craft a malicious archive containing files with specially crafted names like ../../../../path/to/target/file . When the Zimbra server extracts the archive, it follows these path traversal sequences ( ../ ). As a result, instead of placing the file inside the intended temporary extraction directory, it is written to an arbitrary location on the host system's filesystem. This arbitrary file write capability is the core of the vulnerability. An unauthenticated attacker with network access can exploit
If immediate patching is not possible, organizations should consider disabling the WebEx zimlet if it is not business-critical, as this removes the attack vector. Vendor Guidance: Refer to the official Zimbra 8.8.15 P7 Release Notes for specific patching instructions. Proof of Concept (PoC) When the Zimbra server extracts the archive, it
Massive scanning activity has been tracked by global security firms.
The server can read restricted internal resources, enabling access to local metadata services, developer portals, or cloud instance endpoints (e.g., AWS IMDS endpoints).