CVE-2023-37580

MediumPublished

Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting (XSS) Vulnerability

Published: Jul 31, 2023
Updated: Oct 30, 2025
Assigning CNA: mitre
Evidence observed: Jul 27, 2023

Primary CVSS

6.1/ 10Medium

nvd · CVSS 3.1

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

EPSS probability estimate

49.1%

Moderate · next 30 days

Percentile: 98.9%
Model date: Oct 15, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

CISA Known Exploited

This CVE appears in the CISA Known Exploited Vulnerabilities catalog.

Summary

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

Sources

Repository evidence: Files: 1 · Repositories: 1

1 Template

Zimbra Collaboration Suite (ZCS) v.8.8.15 - Cross-Site ScriptingTemplate
http/cves/2023/CVE-2023-37580.yaml
Nuclei Templates
DetectionEvidence observed: Sep 26, 2026Revision: 17f5725dc10cRelated tool
Declared conditions
- network: http($.protocol_keys)
- verification: status,word($.matchers[*].type)

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