Overview
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.
https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories ; https://nvd.nist.gov/vuln/detail/CVE-2023-34192
Key Details
| Property | Value |
|---|---|
| CVE ID | CVE-2023-34192 |
| Vendor / Product | Synacor — Zimbra Collaboration Suite (ZCS) |
| NVD Published | 2023-07-06 |
| NVD Last Modified | 2025-10-27 |
| CVSS 3.1 Score | 9 |
| CVSS 3.1 Vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H |
| Severity | CRITICAL |
| CWE | CWE-79 |
| CISA KEV Added | 2025-02-25 |
| CISA KEV Deadline | 2025-03-18 |
| Known Ransomware Use | No |
CVSS 3.1 Breakdown
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High
Required Action
CISA BOD 22-01 Deadline: 2025-03-18.
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Timeline
| Date | Event |
|---|---|
| 2025-02-25 | Added to CISA Known Exploited Vulnerabilities catalog |
| 2025-03-18 | CISA BOD 22-01 remediation deadline |
References
| Resource | Type |
|---|---|
| NVD — CVE-2023-34192 | Vulnerability Database |
| CISA KEV Catalog Entry | US Government |