Sunday, July 4, 2021



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).

References to Advisories, Solutions, and Tools

References to Advisories, Solutions, and Tools

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Thanks for everything Templateism - You should have written the code a little more complicated