CVE-2026-33368

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. 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.

6.1 /10

CVSS v3 : MEDIUM

V3 Legend

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 Vendor Advisory Release Notes
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

01 Apr 2026, 15:37

Type Values Removed Values Added
Summary
  • (es) Zimbra Collaboration Suite (ZCS) 10.0 y 10.1 contiene una vulnerabilidad de cross-site scripting (XSS) reflejada en la interfaz REST de Classic Webmail (/h/rest). La aplicación no logra sanear correctamente la entrada proporcionada por el usuario, permitiendo a un atacante no autenticado inyectar JavaScript malicioso en una URL manipulada. Cuando un usuario víctima accede al enlace, el script inyectado se ejecuta en el contexto de la aplicación de webmail de Zimbra, lo que podría permitir al atacante realizar acciones en nombre de la víctima.
References () https://wiki.zimbra.com/wiki/Security_Center - () https://wiki.zimbra.com/wiki/Security_Center - Vendor Advisory, Release Notes
References () https://wiki.zimbra.com/wiki/Zimbra_Releases/10.1.16#Security_Fixes - () https://wiki.zimbra.com/wiki/Zimbra_Releases/10.1.16#Security_Fixes - Release Notes
References () https://wiki.zimbra.com/wiki/Zimbra_Responsible_Disclosure_Policy - () https://wiki.zimbra.com/wiki/Zimbra_Responsible_Disclosure_Policy - Product
References () https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories - () https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories - Vendor Advisory
First Time Synacor zimbra Collaboration Suite
Synacor
CPE cpe:2.3:a:synacor:zimbra_collaboration_suite:*:*:*:*:*:*:*:*

23 Mar 2026, 14:16

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 6.1
CWE CWE-79

20 Mar 2026, 14:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-03-20 14:16

Updated : 2026-04-01 15:37

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')