CVE-2023-37580

6.1 mediumKEVEPSS 49%

Medium (6.1) in Synacor Zimbra Collaboration Suite (ZCS). In CISA KEV since 2023-07-27. EPSS 49% chance of exploitation in the next 30 days.

Zimbra Collaboration (ZCS) 8 before 8.8.15 Patch 41 allows XSS in the Zimbra Classic Web Client.

Severity

6.1 medium

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS: 49% chance of exploitation in the next 30 days; higher than 98% of CVEs (scores of 2026-10-31)
CISA KEV: listed 2023-07-27, due 2023-08-17
CWE: CWE-79
Published: 2023-07-31
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19