{"id":"CVE-2021-34807","details":"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).","modified":"2025-11-14T09:25:40.769055Z","published":"2021-07-02T19:15:08.330Z","references":[{"type":"ADVISORY","url":"https://wiki.zimbra.com/wiki/Security_Center"},{"type":"ADVISORY","url":"https://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P23"},{"type":"ADVISORY","url":"https://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P16"},{"type":"ADVISORY","url":"https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/zimbra/zm-build","events":[{"introduced":"0"},{"fixed":"ac6081fa002b1511e926aba37740d2b6c20f3f43"}]}],"versions":["8.7.10","8.7.11","8.7.6","8.7.7","8.7.9","8.8.0.beta1","8.8.10","8.8.11","8.8.11.p3","8.8.12","8.8.2","8.8.3","8.8.4","8.8.6","8.8.7","8.8.8","8.8.9","8.8.9.p1","8.8.9.p3"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-34807.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"}]}