Summaryinfo

A vulnerability classified as problematic has been found in Zimbra Collaboration Suite 10.0/10.1. Affected is an unknown function. This manipulation causes cross-site request forgery. The identification of this vulnerability is CVE-2026-33373. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability has been found in Zimbra Collaboration Suite 10.0/10.1 and classified as problematic. Affected by this vulnerability is some unknown processing. The manipulation with an unknown input leads to a cross-site request forgery vulnerability. The CWE definition for the vulnerability is CWE-352. The web application does not, or can not, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request. As an impact it is known to affect integrity. The summary by CVE is:

An issue was discovered in Zimbra Collaboration (ZCS) 10.0 and 10.1. A Cross-Site Request Forgery (CSRF) vulnerability exists in Zimbra Web Client due to the issuance of authentication tokens without CSRF protection during certain account state transitions. Specifically, tokens generated after operations such as enabling two-factor authentication or changing a password may lack CSRF enforcement. While such a token is active, authenticated SOAP requests that trigger token generation or state changes can be performed without CSRF validation. An attacker could exploit this by inducing a victim to submit crafted requests, potentially allowing sensitive account actions such as disabling two-factor authentication. The issue is mitigated by ensuring CSRF protection is consistently enforced for all issued authentication tokens.

It is possible to read the advisory at wiki.zimbra.com. This vulnerability is known as CVE-2026-33373 since 03/19/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• Groupware Software

Vendor

• Zimbra

Name

• Collaboration Suite

Version

• 10.0
• 10.1

CPE 2.3info

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CPE 2.2info

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