XSS in Synacor Zimbra_collaboration_suite
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.
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.773 (99.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H.
Affected products
- Synacor Zimbra_collaboration_suite — versions 8.8.15
- N/a — versions n/a
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
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.
Public proof-of-concept exploits
References
- cve@mitre.org (Vendor Advisory)
- cve@mitre.org (Release Notes, Vendor Advisory)
- cve@mitre.org (Not Applicable)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)
Frequently asked questions
- What is CVE-2023-34192?
- CVE-2023-34192 is a critical-severity vulnerability in Synacor Zimbra_collaboration_suite, classified under Cross-site Scripting. CVSS score: 9.0/10. Published 2023-07-06.
- How severe is CVE-2023-34192?
- Critical severity. CVSS v3 base score is 9.0 out of 10.
- Is CVE-2023-34192 known to be exploited?
- Yes. CVE-2023-34192 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2025-02-25), indicating it is being actively exploited. 4 public proof-of-concept repositories are indexed.