CVE-2026-33368

MEDIUM EPSS 12.9%
Published Mar 20, 20263mo ago · Modified Jun 17, 20261w ago
6.1 CVSS 3.1
Medium
Find Similar
Published Mar 20, 2026 3mo ago
Last Modified Jun 17, 2026 1w ago

Description

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 Details

Base Score
6.1
Exploitability
2.8
Impact
2.7
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Changed
Confidentiality Low
Integrity Low
Availability None

Threat Intelligence

EPSS Exploit Probability
12.9% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-79 Cross-site Scripting Injection

Affected Products 1

VendorProductVersionRange
synacorzimbra_collaboration_suite*≥10.0.0  –  <10.1.16

References 4

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

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.