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9.8
CVSSv3

CVE-2021-35209

Published: 02/07/2021 Updated: 20/09/2021
CVSS v2 Base Score: 7.5 | Impact Score: 6.4 | Exploitability Score: 10
CVSS v3 Base Score: 9.8 | Impact Score: 5.9 | Exploitability Score: 3.9
VMScore: 668
Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P
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Vulnerability Summary

An issue exists in ProxyServlet.java in the /proxy servlet in Zimbra Collaboration Suite 8.8 prior to 8.8.15 Patch 23 and 9.x prior to 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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zimbra collaboration

zimbra collaboration 8.8.15

zimbra collaboration 9.0.0

References

CWE-918https://wiki.zimbra.com/wiki/Zimbra_Security_Advisorieshttps://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P23https://wiki.zimbra.com/wiki/Security_Centerhttps://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P16https://blog.sonarsource.com/zimbra-webmail-compromise-via-emailhttps://nvd.nist.gov
CVSSv3
CVSSv2
CVSSv3
VMScore
Recommendations:
CVE-2006-4304CVE-2024-4240arbitrary CVE-2024-31601XSSCVE-2023-20198CVE-2024-4256CVE-2024-3342encryption
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