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CISA KEV · Known exploitedMedium

CVE-2023-37580

Synacor Zimbra Collaboration Suite (ZCS)

Zimbra Collaboration (ZCS) 8 before 8.8.15 Patch 41 allows XSS in the Zimbra Classic Web Client.

CVSS
6.1
EPSS
46.7%
98.7% percentile
CISA KEV
Listed
Published
2023.08.01
PRIORITY ASSESSMENT

Immediate review

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

Known exploitationConfirmed by CISA KEV
Exploit probability46.7%
Technical severityCVSS 6.1

Vulnerability overview

Zimbra Collaboration (ZCS) 8 before 8.8.15 Patch 41 allows XSS in the Zimbra Classic Web Client.

Affected product and versions

Product
Synacor Zimbra Collaboration Suite (ZCS)
Affected versions
>= 8.8.0 < 8.8.15, 8.8.15
Fixed versions
8.8.15

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
CISA required action

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Due date: 2023.08.17
  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-79
KEV added
2023.07.27
Ransomware use
미확인
CVE-2023-37580 — Synacor Zimbra Collaboration Suite (ZCS) | SECUFOCUS NOW