A reflected cross-site scripting (XSS) vulnerability in the /public/launchNewWindow.jsp component of Zimbra Collaboration (aka ZCS) 9.0 all…

published 2022-04-20 4 y ago modified 2026-06-17 4 mo ago also EUVD-2022-32414

cvss: 6.1; version 3.1, CNA
cisa kev: Exploited; added 2023-04-03
epss: 17.6%; EPSS 17.6% chance of exploitation in 30 days, percentile 97%
public exploits: 0; none known, plus a Nuclei check

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.

Patch / fix

cisa required action Apply updates per vendor instructions.

Timeline

2022-04-20 Published
2023-04-03 Added to CISA KEV
2023-04-24 CISA patch deadline
2025-01-29 CISA SSVC: exploitation active

Known exploited

Added: 3 y ago (2023-04-03)
Patch by: 2023-04-24 (3 y ago)
Ransomware: Not known
Required action: Apply updates per vendor instructions.
Vendor, product: Synacor, Zimbra Collaboration Suite (ZCS)
CISA name: Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting (XSS) Vulnerability

CISA SSVC

Exploitation: Active, exploited in the wild
Automatable: no
Technical impact: partial
Assessed: 21 mo ago (2025-01-29)

Exploit prediction

17.63% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

Nuclei template Zimbra Collaboration (ZCS) - Cross Site Scripting nuclei detection template

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	6.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD	3.1	6.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CNA	3.1	6.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD	2.0	4.3	AV:N/AC:M/Au:N/C:N/I:P/A:N

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

wiki.zimbra.com /wiki/Zimbra_Security_Advisories
vendor-advisory
wiki.zimbra.com /wiki/Security_Center
vendor-advisory
wiki.zimbra.com /wiki/Zimbra_Releases/9.0.0/P24
release-notes, vendor-advisory
cisa.gov /known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-27926
government-resource, us-government-resource

Sources

CVE List CVE-2022-27926
NVD CVE-2022-27926

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary