CVE-2026-33372
Medium
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.
SeverityMedium
CVSS5.4
Exploit probability—
Product
Synacor Zimbra Collaboration Suite
PublishedMar 20, 2026
First seenMar 20, 2026
Weakness typeCWE-352Cross-site request forgery (CSRF)
How to fix
Update
- synacor zimbra_collaboration_suite10.1.16 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| synacor zimbra_collaboration_suite | 10.0.0 ≤ v < 10.1.16 | 10.1.16 |
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