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"cpe:2.3:a:zimbra:collaboration:9.0.0:p7:*:*:*:*:*:*", "matchCriteriaId": "7215AE2C-8A33-4AB9-88D5-7C8CD11E806C", "vulnerable": true}, {"criteria": "cpe:2.3:a:zimbra:collaboration:9.0.0:p8:*:*:*:*:*:*", "matchCriteriaId": "CDC810C7-45DA-4BDF-9138-2D3B2750243E", "vulnerable": true}, {"criteria": "cpe:2.3:a:zimbra:collaboration:9.0.0:p9:*:*:*:*:*:*", "matchCriteriaId": "E09D95A4-764D-4E0B-8605-1D94FD548AB2", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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)."}, {"lang": "es", "value": "Se ha detectado un problema en el archivo ProxyServlet.java en el servlet /proxy en Zimbra Collaboration Suite versiones 8.8 anteriores a 8.8.15 Patch 23 y versiones 9.x anteriores a 9.0.0 Patch 16. El valor de la cabecera X-Host sobrescribe el valor de la cabecera Host en las peticiones proxy. El valor de la cabecera X-Host no es comprobado con la lista blanca de hosts a los que Zimbra tiene permitido hacer proxy (la configuraci\u00f3n zimbraProxyAllowedDomains)"}], "id": "CVE-2021-35209", "lastModified": "2026-06-17T03:57:18.203", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 7.5, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 6.4, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": true}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-07-02T19:15:08.460", "references": [{"source": "cve@mitre.org", "tags": ["Exploit", "Third Party Advisory"], "url": "https://blog.sonarsource.com/zimbra-webmail-compromise-via-email"}, {"source": "cve@mitre.org", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://wiki.zimbra.com/wiki/Security_Center"}, {"source": "cve@mitre.org", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P23"}, {"source": "cve@mitre.org", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P16"}, {"source": "cve@mitre.org", "tags": ["Vendor Advisory"], "url": "https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Third Party Advisory"], "url": "https://blog.sonarsource.com/zimbra-webmail-compromise-via-email"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://wiki.zimbra.com/wiki/Security_Center"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P23"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P16"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-918"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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