CVE-2023-37580
Medium 6.1 Exploited in the wild (KEV)
Confirmed active exploitation — CISA KEV catalog
- Name
- Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting (XSS) Vulnerability
- Added to catalog
- Remediation due date (US federal)
- Required action
- Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Description
Zimbra Collaboration (ZCS) 8 before 8.8.15 Patch 41 allows XSS in the Zimbra Classic Web Client.
Metrics
- CVSS 3.1
-
6.1 (MEDIUM)
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - EPSS — exploit probability
- 49% (percentile: 99) as of 2 November 2026
- CWE
- CWE-79
Affected products
synacor: zimbra collaboration suite
References
- http://www.openwall.com/lists/oss-security/2023/11/17/2 Mailing ListPatch
- http://www.openwall.com/lists/oss-security/2023/11/17/2 Mailing ListPatch
- https://wiki.zimbra.com/wiki/Security_Center Release Notes
- https://wiki.zimbra.com/wiki/Zimbra_Responsible_Disclosure_Policy Not Applicable
- https://wiki.zimbra.com/wiki/Security_Center Release Notes
- https://wiki.zimbra.com/wiki/Zimbra_Responsible_Disclosure_Policy Not Applicable
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023… US Government Resource