medium
6.1
CWE
601
Advisory Published
Updated

CVE-2021-34807

First published: Fri Jul 02 2021(Updated: )

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).

Credit: cve@mitre.org

Affected SoftwareAffected VersionHow to fix
Zimbra Collaboration<8.8.15
Zimbra Collaboration=8.8.15
Zimbra Collaboration=8.8.15-p1
Zimbra Collaboration=8.8.15-p10
Zimbra Collaboration=8.8.15-p11
Zimbra Collaboration=8.8.15-p12
Zimbra Collaboration=8.8.15-p13
Zimbra Collaboration=8.8.15-p14
Zimbra Collaboration=8.8.15-p15
Zimbra Collaboration=8.8.15-p16
Zimbra Collaboration=8.8.15-p17
Zimbra Collaboration=8.8.15-p18
Zimbra Collaboration=8.8.15-p19
Zimbra Collaboration=8.8.15-p2
Zimbra Collaboration=8.8.15-p20
Zimbra Collaboration=8.8.15-p21
Zimbra Collaboration=8.8.15-p22
Zimbra Collaboration=8.8.15-p3
Zimbra Collaboration=8.8.15-p4
Zimbra Collaboration=8.8.15-p5
Zimbra Collaboration=8.8.15-p6
Zimbra Collaboration=8.8.15-p7
Zimbra Collaboration=8.8.15-p8
Zimbra Collaboration=8.8.15-p9
Zimbra Collaboration=9.0.0
Zimbra Collaboration=9.0.0-p1
Zimbra Collaboration=9.0.0-p10
Zimbra Collaboration=9.0.0-p11
Zimbra Collaboration=9.0.0-p12
Zimbra Collaboration=9.0.0-p13
Zimbra Collaboration=9.0.0-p14
Zimbra Collaboration=9.0.0-p15
Zimbra Collaboration=9.0.0-p2
Zimbra Collaboration=9.0.0-p3
Zimbra Collaboration=9.0.0-p4
Zimbra Collaboration=9.0.0-p5
Zimbra Collaboration=9.0.0-p6
Zimbra Collaboration=9.0.0-p7
Zimbra Collaboration=9.0.0-p8
Zimbra Collaboration=9.0.0-p9

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Reference Links

Frequently Asked Questions

  • What is CVE-2021-34807?

    CVE-2021-34807 is an open redirect vulnerability that exists in the /preauth Servlet in Zimbra Collaboration Suite through version 9.0.

  • How does CVE-2021-34807 vulnerability work?

    To exploit the vulnerability, an attacker would need to have obtained a valid zimbra auth token or a valid preauth token and redirect a user to any URL.

  • What is the severity level of CVE-2021-34807?

    The severity level of CVE-2021-34807 is medium, with a CVSS score of 6.1.

  • Which versions of Zimbra Collaboration Suite are affected by CVE-2021-34807?

    Zimbra Collaboration Suite versions up to and including 9.0 are affected by CVE-2021-34807.

  • How can I fix CVE-2021-34807 vulnerability?

    Ensure you are using a version of Zimbra Collaboration Suite that is patched to a version containing the fix, such as version 8.8.15-p23 or 9.0.0-p16.

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