Zimbra Collaboration (ZCS) before 10.1.12 allows SSRF because of the configuration of the chat proxy.
https://wiki.zimbra.com/wiki/Zimbra_Releases/10.1.12
https://wiki.zimbra.com/wiki/Security_Center
https://blog.zimbra.com/2025/10/patch-release-update-zimbra-10-1-12/