VULNERABILITY INTELLIGENCE

CVE-2021-34807

CVSS score6.1 MEDIUM
EPSS probability0.98%
CISA KEVNot currently listed
Published2021-07-02
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

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).

Weakness classification

  • nvd@nist.gov: CWE-601

Primary references