CVE-2022-27926
KEVSynacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting (XSS) Vulnerability
Description
Synacor Zimbra Collaboration Suite (ZCS) contains a cross-site scripting vulnerability by allowing an endpoint URL to accept parameters without sanitizing.
A reflected cross-site scripting (XSS) vulnerability in the /public/launchNewWindow.jsp component of Zimbra Collaboration (aka ZCS) 9.0 allows unauthenticated attackers to execute arbitrary web script or HTML via request parameters.
CVSS 3.1 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:NPublishedApr 21, 2022
Last modifiedJun 17, 2026
Added to KEVApr 3, 2023
Remediation dueApr 24, 2023
References
- wiki.zimbra.com/wiki/Security_CenterVendor Advisory
- wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P24Release NotesVendor Advisory
- wiki.zimbra.com/wiki/Zimbra_Security_AdvisoriesVendor Advisory
- cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-27926US Government Resource
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62
Risk assessment · High
Actively exploited. Patch immediately.
- Exploitation
- Confirmed in the wild (CISA KEV)
- Federal remediation deadline
- Overdue by 1281 days
- CVSS
- 6.1 MEDIUM
- EPSS (30-day exploit probability)
- 17.6% · top 3% of all CVEs
- Weakness
- CWE-79
- Attack vector
- Network, remotely reachable
Recommended actions
- 1.Apply updates per vendor instructions.
- 2.Treat as emergency change: patch or isolate internet-facing instances first.
- 3.Review exposure: confirm which instances are reachable from the internet and restrict access until patched.
- 4.Hunt for compromise: review logs for the disclosure window, not just from the patch date.
Assessment is derived automatically from the live signals above; verify against your own asset inventory.