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CISA KEV · Known exploitedMedium

CVE-2022-27926

Synacor Zimbra Collaboration Suite (ZCS)

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
EPSS
17.6%
96.8% percentile
CISA KEV
Listed
Published
2022.04.21
PRIORITY ASSESSMENT

Immediate review

CISA has listed this vulnerability in the Known Exploited Vulnerabilities catalog.

Known exploitationConfirmed by CISA KEV
Exploit probability17.6%
Technical severityCVSS 6.1

Vulnerability overview

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.

Affected product and versions

Product
Synacor Zimbra Collaboration Suite (ZCS)
Affected versions
9.0.0
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
CISA required action

Apply updates per vendor instructions.

Due date: 2023.04.24
  1. 1
    Identify

    Confirm that Synacor Zimbra Collaboration Suite (ZCS) and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CWE
CWE-138, CWE-79
KEV added
2023.04.03
Ransomware use
미확인
CVE-2022-27926 — Synacor Zimbra Collaboration Suite (ZCS) | SECUFOCUS NOW