Medium 6.1Known exploited (CISA KEV)Published Apr 20, 2022

CVE-2022-27926A 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 scrip…

Updated under an hour ago (2026-10-19 09:50 UTC)

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It affects synacor zimbra_collaboration_suite. Add what you run to find out whether that includes you.

CISA lists it as known exploited since Apr 3, 2023; federal agencies had to remediate by Apr 24, 2023. Treat that date as your deadline.

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Every CVE for synacor zimbra_collaboration_suite

Exploited in the last 30 days

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: 6.1 MEDIUM (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness (CWE): CWE-79
Known exploited: Added to CISA KEV Apr 3, 2023; federal remediation due Apr 24, 2023Apply updates per vendor instructions.
EPSS (exploitation in the next 30 days): 17.63% (percentile 97)
Assigned by: mitre
NVD analysis: Analyzed
Record last updated: Oct 21, 2025
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

synacor zimbra_collaboration_suite synacor:zimbra_collaboration_suite	9.0.0; 9.0.0; 9.0.0; 9.0.0; 9.0.0; 9.0.0; 9.0.0; 9.0.0; and 16 more ranges	NVD

References

https://wiki.zimbra.com/wiki/Zimbra_Security_Advisoriesx-refsource-misc, vendor-advisory
https://wiki.zimbra.com/wiki/Security_Centerx-refsource-misc, vendor-advisory
https://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P24x-refsource-misc, release-notes, vendor-advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-27926us-government-resource

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.