CVE-2023-34192

Name: CVE-2023-34192
Creator: NVD / NIST
Published: 2023-07-06T16:15:10.047+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9/10Actively ExploitedEPSS 77.27%

Last modified Jun 17, 2026

CVE-2023-34192 is a critical-severity vulnerability rated 9/10 on the CVSS scale. 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 has confirmed active exploitation in the wild. EPSS estimates a 77.27% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9/10

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

EPSS Probability

77.27%

99.5th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by Mar 18, 2025.

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Synacor	Zimbra Collaboration Suite	8.8.15

References

https://wiki.zimbra.com/wiki/Security_CenterRelease Notes, Vendor Advisory
https://wiki.zimbra.com/wiki/Zimbra_Responsible_Disclosure_PolicyNot Applicable
https://wiki.zimbra.com/wiki/Zimbra_Security_AdvisoriesVendor Advisory
https://wiki.zimbra.com/wiki/Security_CenterRelease Notes, Vendor Advisory
https://wiki.zimbra.com/wiki/Zimbra_Responsible_Disclosure_PolicyNot Applicable
https://wiki.zimbra.com/wiki/Zimbra_Security_AdvisoriesVendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-34192US Government Resource

Timeline

Published: Jul 6, 2023
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2023-34192?

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.

How severe is CVE-2023-34192?

CVE-2023-34192 has a CVSS score of 9/10 (CRITICAL severity). The EPSS model estimates a 77.27% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2023-34192?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-34192?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST