CVE-2024-45511: Synacor Zimbra Collaboration Suite

Medium severity, CVSS 5.4. EPSS: 0.3% chance of exploitation in the next 30 days.

An issue was discovered in Zimbra Collaboration (ZCS) through 10.1. A reflected Cross-Site Scripting (XSS) issue exists through the Briefcase module due to improper sanitization of file content by the OnlyOffice formatter. This occurs when the victim opens a crafted URL pointing to a shared folder containing a malicious file uploaded by the attacker. The vulnerability allows the attacker to execute arbitrary JavaScript in the context of the victim's session.

Affected products

• Synacor Zimbra Collaboration Suite: before 10.0.9 (fixed in 10.0.9); version 10.1.0 only

Published 2024-11-20. Last modified 2026-06-17.