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).
Published: 2021-07-02
Score: 6.1 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
EUVD EUVD EUVD-2021-21454 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).
History

Wed, 16 Jul 2025 13:45:00 +0000

Type Values Removed Values Added
Metrics epss

{'score': 0.00841}

epss

{'score': 0.00864}


Subscriptions

Zimbra Collaboration
cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2024-08-04T00:26:53.989Z

Reserved: 2021-06-16T00:00:00.000Z

Link: CVE-2021-34807

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2021-07-02T19:15:08.330

Modified: 2024-11-21T06:11:14.623

Link: CVE-2021-34807

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses