# CVE-2023-34192: Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting (XSS) Vulnerability

> CVE-2023-34192: Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting (XSS) Vulnerability. CVSS 9.0 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2023-34192
Last updated: 2025-10-21T23:05:44Z

- Published: 2023-07-06 00:00 UTC · Updated: 2025-10-21 23:05 UTC · Assigner: mitre
- CVSS: 9.0 (CVSS 3.1) · Severity: Critical · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
- EPSS: 77.3%, 100th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2025-02-25, federal due date 2025-03-18, ransomware use: Unknown

## Description

Cross Site Scripting vulnerability in Zimbra ZCS v.8.8.15 allows a remote authenticated attacker to execute arbitrary code via a crafted script to the /h/autoSaveDraft function.

## CISA required action

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

## Affected vendors and products

- Synacor: Zimbra Collaboration Suite (ZCS)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2023-34192)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2023-34192)
- [https://wiki.zimbra.com/wiki/Security\_Center](https://wiki.zimbra.com/wiki/Security_Center)
- [https://wiki.zimbra.com/wiki/Zimbra\_Responsible\_Disclosure\_Policy](https://wiki.zimbra.com/wiki/Zimbra_Responsible_Disclosure_Policy)
- [https://wiki.zimbra.com/wiki/Zimbra\_Security\_Advisories](https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2023-34192 · Markdown: https://rewindex.com/cve/CVE-2023-34192.md · JSON: https://rewindex.com/api/v1/cves/CVE-2023-34192 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:09:57.490Z