CVE-2026-73572
CVSS Score
6.1
EPSS Score
0.0%
EPSS Percentile
0th
In Zimbra Collaboration (ZCS) before 10.1.17, a stored cross-site scripting (XSS) vulnerability exists in the Zimbra Classic Web Client due to insufficient sanitization of specific attachment content during inline preview. An attacker can send a crafted email containing a malicious attachment that, when previewed by a user, executes arbitrary JavaScript within the victim's browser session. Successful exploitation may allow an attacker to perform unauthorized actions on behalf of the victim user, potentially leading to data exfiltration or unauthorized access to sensitive information.
| CWE | CWE-79 |
| Vendor | zimbra |
| Product | collaboration |
| Published | Aug 13, 2026 |
| Last Updated | Aug 13, 2026 |
Stay Ahead of the Next One
Get instant alerts for zimbra collaboration
Be the first to know when new medium vulnerabilities affecting zimbra collaboration are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
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
Affected Versions
Zimbra / Collaboration
0 < 10.1.17