CVE-2023-37580

CVE Enrichment

CVSS: 6.1 MEDIUM
EPSS: 49.08%
EPSS Percentile: 98.86%
CISA KEV: YES — Known Exploited Vulnerability

Description

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

Technical Details

CVSS Version: 3.1
CNA / NVD Source: cve@mitre.org
Published: 31-Jul-2023 23:15
Last Modified: 17-Jun-2026 13:08
EPSS Date: 2026-10-11
CWE: CWE-79

CVSS Vector


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

CISA KEV Details

Date Added: 2023-07-27
Remediation Due: 2023-08-17
Known Ransomware Campaign Use: Unknown
Required Action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Notes: https://wiki.zimbra.com/wiki/Security_Center ; https://nvd.nist.gov/vuln/detail/CVE-2023-37580

Affected Products / Versions

synacor / zimbra_collaboration_suite
Version / affected range: * · from (inclusive) 8.8.0 · before (exclusive) 8.8.15
cpe:2.3:a:synacor:zimbra_collaboration_suite:*:*:*:*:*:*:*:*
synacor / zimbra_collaboration_suite
Version / affected range: 8.8.15
cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p11:*:*:*:*:*:*
synacor / zimbra_collaboration_suite
Version / affected range: 8.8.15
cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p26:*:*:*:*:*:*
synacor / zimbra_collaboration_suite
Version / affected range: 8.8.15
cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p3:*:*:*:*:*:*
synacor / zimbra_collaboration_suite
Version / affected range: 8.8.15
cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p30:*:*:*:*:*:*
synacor / zimbra_collaboration_suite
Version / affected range: 8.8.15
cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p31:*:*:*:*:*:*
synacor / zimbra_collaboration_suite
Version / affected range: 8.8.15
cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p32:*:*:*:*:*:*
synacor / zimbra_collaboration_suite
Version / affected range: 8.8.15
cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p33:*:*:*:*:*:*
synacor / zimbra_collaboration_suite
Version / affected range: 8.8.15
cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p34:*:*:*:*:*:*
synacor / zimbra_collaboration_suite
Version / affected range: 8.8.15
cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p35:*:*:*:*:*:*
synacor / zimbra_collaboration_suite
Version / affected range: 8.8.15
cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p37:*:*:*:*:*:*
synacor / zimbra_collaboration_suite
Version / affected range: 8.8.15
cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p38:*:*:*:*:*:*
synacor / zimbra_collaboration_suite
Version / affected range: 8.8.15
cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p40:*:*:*:*:*:*
synacor / zimbra_collaboration_suite
Version / affected range: 8.8.15
cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p5:*:*:*:*:*:*

References

Last enrichment sync: 12-Oct-2026 18:33
Sources: NVD · FIRST EPSS · CISA KEV
Latest successful provider update; providers refresh independently.

Reported Context (1)

Threat Analysis Group later documented four separate threat groups working the same zero-day known as CVE-2023-37580. Each of these groups went after email, credentials, and authentication tokens. Attackers figured out Zimbra Vulnerabilities Could Let Attackers Manipulate Email, Documents and Calendars

CVE (5)

Vendors (1)

Products (2)

Industries (1)

Countries (2)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.