Vulnerability 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 Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Synacor | Zimbra Collaboration Suite | >= 10.0.0, < 10.1.16 |
Related Weaknesses (CWE)
References
- https://wiki.zimbra.com/wiki/Security_CenterVendor AdvisoryRelease Notes
- https://wiki.zimbra.com/wiki/Zimbra_Releases/10.1.16#Security_FixesRelease Notes
- https://wiki.zimbra.com/wiki/Zimbra_Responsible_Disclosure_PolicyProduct
- https://wiki.zimbra.com/wiki/Zimbra_Security_AdvisoriesVendor Advisory
FAQ
What is CVE-2026-33368?
CVE-2026-33368 is a vulnerability with a CVSS score of 6.1 (MEDIUM). 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...
How severe is CVE-2026-33368?
CVE-2026-33368 has been rated MEDIUM with a CVSS base score of 6.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-33368?
Check the references section above for vendor advisories and patch information. Affected products include: Synacor Zimbra Collaboration Suite.