CVE-2021-35209

Published 02 Jul 2021 · Updated 04 Aug 2024

E-mail alert when it lands in KEV, gets a public PoC or its score goes up.

3Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackepss 3.0%

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).

Affected products

n/a · n/a

References

https://blog.sonarsource.com/zimbra-webmail-compromise-via-email https://wiki.zimbra.com/wiki/Security_Center https://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P23 https://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P16 https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories