Vulnerability Description
An open redirect vulnerability exists in the /preauth Servlet in Zimbra Collaboration Suite through 9.0. To exploit the vulnerability, an attacker would need to have obtained a valid zimbra auth token or a valid preauth token. Once the token is obtained, an attacker could redirect a user to any URL via isredirect=1&redirectURL= in conjunction with the token data (e.g., a valid authtoken= value).
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Zimbra | Collaboration | < 8.8.15 |
Related Weaknesses (CWE)
References
- https://wiki.zimbra.com/wiki/Security_CenterRelease NotesVendor Advisory
- https://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P23Release NotesVendor Advisory
- https://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P16Release NotesVendor Advisory
- https://wiki.zimbra.com/wiki/Zimbra_Security_AdvisoriesVendor Advisory
- https://wiki.zimbra.com/wiki/Security_CenterRelease NotesVendor Advisory
- https://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P23Release NotesVendor Advisory
- https://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P16Release NotesVendor Advisory
- https://wiki.zimbra.com/wiki/Zimbra_Security_AdvisoriesVendor Advisory
FAQ
What is CVE-2021-34807?
CVE-2021-34807 is a vulnerability with a CVSS score of 6.1 (MEDIUM). An open redirect vulnerability exists in the /preauth Servlet in Zimbra Collaboration Suite through 9.0. To exploit the vulnerability, an attacker would need to have obtained a valid zimbra auth token...
How severe is CVE-2021-34807?
CVE-2021-34807 has been rated MEDIUM with a CVSS base score of 6.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-34807?
Check the references section above for vendor advisories and patch information. Affected products include: Zimbra Collaboration.