CVE-2022-27926

MEDIUM6.1

CISA KEV

Published 2022-04-21 · Updated 2026-06-17 · Source cve@mitre.org

Summary

CVE-2022-27926 is a medium-severity (CVSS 6.1) vulnerability in Synacor Zimbra Collaboration Suite (ZCS). CISA added it to the Known Exploited Vulnerabilities catalog on April 3, 2023, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by April 24, 2023. CISA does not currently list it as used in ransomware campaigns. Synacor has 19 vulnerabilities in the KEV catalog, 6 of them linked to ransomware.

All 19 known-exploited Synacor vulnerabilities →

Description

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

CWE-79CWE-79

CISA Known-Exploited Vulnerability

Product: Synacor — Zimbra Collaboration Suite (ZCS)

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

Date added: 2023-04-03 · Due: 2023-04-24

Required action: Apply updates per vendor instructions.

References

View on NVD

More exploited Synacor vulnerabilities

Most recently added to CISA KEV

CVE-2026-73570
Zimbra Collaboration Suite (ZCS) — Zimbra Collaboration Suite (ZCS) OS Command Injection Vulnerability
added 2026-08-21
CVE-2025-48700
Zimbra Collaboration Suite (ZCS) — Synacor Zimbra Collaboration Suite (ZCS) Cross-site Scripting Vulnerability
added 2026-04-20
CVE-2025-66376
Zimbra Collaboration Suite (ZCS) — Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting Vulnerability
added 2026-03-18
CVE-2020-7796
Zimbra Collaboration Suite — Synacor Zimbra Collaboration Suite (ZCS) Server-Side Request Forgery Vulnerability
added 2026-02-17
CVE-2025-68645
Zimbra Collaboration Suite (ZCS) — Synacor Zimbra Collaboration Suite (ZCS) PHP Remote File Inclusion Vulnerability
added 2026-01-22
CVE-2025-27915
Zimbra Collaboration Suite (ZCS) — Synacor Zimbra Collaboration Suite (ZCS) Cross-site Scripting Vulnerability
added 2025-10-07

View all →

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