An issue was discovered in ProxyServlet.java in the /proxy servlet in Zimbra Collaboration Suite 8.8 before 8.8.15 Patch 23 and 9.x before 9.0.0 Patch 16. The value of the X-Host header overwrites the value of the Host header in proxied requests. The value of X-Host header is not checked against the whitelist of hosts Zimbra is allowed to proxy to (the zimbraProxyAllowedDomains setting).
                
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References
        History
                    Wed, 16 Jul 2025 13:45:00 +0000
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 MITRE
                        MITRE
                    Status: PUBLISHED
Assigner: mitre
Published: 2021-07-02T18:54:43
Updated: 2024-08-04T00:33:51.186Z
Reserved: 2021-06-22T00:00:00
Link: CVE-2021-35209
 Vulnrichment
                        Vulnrichment
                    No data.
 NVD
                        NVD
                    Status : Modified
Published: 2021-07-02T19:15:08.460
Modified: 2024-11-21T06:12:03.717
Link: CVE-2021-35209
 Redhat
                        Redhat
                    No data.