CVE-2026-33372 Details
Description
An issue was discovered in Zimbra Collaboration (ZCS) 10.0 and 10.1. A cross-site request forgery (CSRF) vulnerability exists in Zimbra Webmail due to improper validation of CSRF tokens. The application accepts CSRF tokens supplied within the request body instead of requiring them through the expected request header. An attacker can exploit this issue by tricking an authenticated user into submitting a crafted request. This may allow unauthorized actions to be performed on behalf of the victim.
A cross-site request forgery (CSRF) vulnerability has been identified in Zimbra Collaboration (ZCS) versions 10.0 and 10.1. This vulnerability arises from improper validation of CSRF tokens in Zimbra Webmail, allowing attackers to exploit the issue by tricking authenticated users into submitting crafted requests. The application mistakenly accepts CSRF tokens from the request body instead of the required header, potentially enabling unauthorized actions on behalf of the user.
Users can upgrade to ZCS versions 10.1.13 or 10.0.18, both of which include the necessary security fix. Instructions for upgrading can be found on the Zimbra Releases page.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Mar 23, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://wiki.zimbra.com/wiki/Security_Center | [email protected] | Release NotesVendor Advisory |
| https://wiki.zimbra.com/wiki/Zimbra_Releases/10.1.16#Security_Fixes | [email protected] | Release Notes |
| https://wiki.zimbra.com/wiki/Zimbra_Responsible_Disclosure_Policy | [email protected] | Product |
| https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories | [email protected] | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-352 | Cross-Site Request Forgery (CSRF) | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| synacor zimbra collaboration suite | >= 10.0.0, < 10.1.16 |
CPE
Remediation
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Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 1, 2026 | Initial Analysis | [email protected] |
| Mar 23, 2026 | CVE Modified | CISA-ADP |
| Mar 20, 2026 | New CVE Received | [email protected] |