CVE-2026-33368

Zimbra Collaboration Suite (ZCS) 10.0 and 10.1 contains a reflected cross-site scripting (XSS) vulnerability in the Classic Webmail REST interface (/h/rest). The application fails to properly sanitize user-supplied input, allowing an unauthenticated attacker to inject malicious JavaScript into a crafted URL. When a victim user accesses the link, the injected script executes in the context of the Zimbra webmail application, which could allow the attacker to perform actions on behalf of the victim.

CVSS v3 6.1 MEDIUM

6.1^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://wiki.zimbra.com/wiki/Security_Center	Release Notes Vendor Advisory
https://wiki.zimbra.com/wiki/Zimbra_Releases/10.1.16#Security_Fixes	Release Notes
https://wiki.zimbra.com/wiki/Zimbra_Responsible_Disclosure_Policy	Product
https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:synacor:zimbra_collaboration_suite:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-03-20 14:16

Updated : 2026-06-17 10:37

NVD link : CVE-2026-33368

Mitre link : CVE-2026-33368

CVE.ORG link : CVE-2026-33368

JSON object : View

Products Affected

synacor

zimbra_collaboration_suite

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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