CVE-2023-37580
KEVSynacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting (XSS) Vulnerability
Description
Synacor Zimbra Collaboration Suite (ZCS) contains a cross-site scripting vulnerability impacting the confidentiality and integrity of data.
Zimbra Collaboration (ZCS) 8 before 8.8.15 Patch 41 allows XSS in the Zimbra Classic Web Client.
CVSS 3.1 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:NPublishedJul 31, 2023
Last modifiedJun 17, 2026
Added to KEVJul 27, 2023
Remediation dueAug 17, 2023
References
- openwall.com/lists/oss-security/2023/11/17/2Mailing ListPatch
- wiki.zimbra.com/wiki/Security_CenterRelease Notes
- wiki.zimbra.com/wiki/Zimbra_Responsible_Disclosure_PolicyNot Applicable
- cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-37580US Government Resource
0 recent articles mention this CVE
65
Risk assessment · High
Actively exploited. Patch immediately.
- Exploitation
- Confirmed in the wild (CISA KEV)
- Federal remediation deadline
- Overdue by 1167 days
- CVSS
- 6.1 MEDIUM
- EPSS (30-day exploit probability)
- 49.1% · top 1% of all CVEs
- Weakness
- CWE-79
- Attack vector
- Network, remotely reachable
Recommended actions
- 1.Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- 2.Treat as emergency change: patch or isolate internet-facing instances first.
- 3.Review exposure: confirm which instances are reachable from the internet and restrict access until patched.
- 4.Hunt for compromise: review logs for the disclosure window, not just from the patch date.
Assessment is derived automatically from the live signals above; verify against your own asset inventory.