Is CVE-2023-34192 in the CISA KEV catalog?

Yes. CVE-2023-34192 is on the CISA Known Exploited Vulnerabilities list, added 2025-02-25.

What is the CVSS severity of CVE-2023-34192?

CVE-2023-34192 has a CVSS v3 base score of 9.0 (CRITICAL).

What is the EPSS score for CVE-2023-34192?

CVE-2023-34192 has an EPSS score of 77.27% (100th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix or mitigate CVE-2023-34192?

No published fix for CVE-2023-34192 has been found yet. It is on the CISA Known Exploited Vulnerabilities list; federal agencies must remediate by 2025-03-18. Apply the vendor's mitigations per CISA's guidance.

CVE & CISA-KEV Catalog

CVE-2023-34192

CRITICALCISA KEVEPSS 100th pctl

9.0

CVSS v3

NVD

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.

CWE-79Cross-Site Scripting (XSS)

How to fix

Actively exploited, no published fix found yet

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.

Federal remediation due: 2025-03-18

Mitigation guidance may be in the linked vendor advisories in the References section below.

TridentStack Control tracks known vulnerabilities across your Windows, macOS, and Linux fleet and shows the fix as soon as one is published. See how it works

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionRequired

ScopeChanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

77.27%probability of exploitation in 30 days

100thpercentile

Very high risk: more likely to be exploited than 100% of all known CVEs.

Known Exploited Vulnerability (CISA KEV)

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

Synacor Zimbra Collaboration Suite (ZCS) contains a cross-site scripting (XSS) vulnerability that allows a remote authenticated attacker to execute arbitrary code via a crafted script to the /h/autoSaveDraft function.

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

Remediation due: 2025-03-18

References

Vendor Advisory2

Government Resource1

cisa.gov

Other references1

wiki.zimbra.com

Related Vulnerabilities

Other CWE-79 (Cross-Site Scripting (XSS)) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-11022	Medium	6.9	99%	-	Fix
CVE-2019-3929	Critical	9.8	99%	KEV	Fix
CVE-2020-9496	Medium	6.1	99%	-	-
CVE-2023-28341	Medium	6.1	99%	-	Fix
CVE-2018-12998	Medium	6.1	98%	-	-
CVE-2025-4123	High	7.6	98%	-	Fix

Embed a live status badge for CVE-2023-34192

Markdown

[![CVE-2023-34192](https://tridentstack.com/cve/badge/CVE-2023-34192.svg)](https://tridentstack.com/cve/CVE-2023-34192)

HTML

<a href="https://tridentstack.com/cve/CVE-2023-34192"><img src="https://tridentstack.com/cve/badge/CVE-2023-34192.svg" alt="CVE-2023-34192"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

See how it works Start freeThis CVE lookup is free and always will be.

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-10-27.