{"id":"CVE-2023-37580","url":"https://www.cyber-defence.io/tools/cve/CVE-2023-37580","generatedAt":"2026-10-31T10:22:29.530Z","title":"Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting (XSS) Vulnerability","description":"Zimbra Collaboration (ZCS) 8 before 8.8.15 Patch 41 allows XSS in the Zimbra Classic Web Client.","published":"2023-07-31T16:15:10.000Z","lastModified":"2026-06-17T06:08:30.000Z","status":"Analyzed","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":6.1,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"},"cwe":["CWE-79"],"affected":["synacor/zimbra collaboration suite"],"epss":{"score":0.49083,"percentile":0.98882,"date":"2026-10-30","history":[{"date":"2026-09-24","score":0.49083,"percentile":0.98844}]},"kev":{"listed":true,"dateAdded":"2023-07-27","dueDate":"2023-08-17","knownRansomwareCampaignUse":"Unknown","notes":"Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.\nhttps://wiki.zimbra.com/wiki/Security_Center ;  https://nvd.nist.gov/vuln/detail/CVE-2023-37580"},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"Known to be exploited in the wild (CISA KEV, CISA remediation deadline 17 August 2023). Treat as an emergency change: patch or isolate now, then hunt for prior compromise."},"changes":[],"references":[{"url":"http://www.openwall.com/lists/oss-security/2023/11/17/2","tags":["Mailing List","Patch"],"source":"cve@mitre.org"},{"url":"https://wiki.zimbra.com/wiki/Security_Center","tags":["Release Notes"],"source":"cve@mitre.org"},{"url":"https://wiki.zimbra.com/wiki/Zimbra_Responsible_Disclosure_Policy","tags":["Not Applicable"],"source":"cve@mitre.org"},{"url":"http://www.openwall.com/lists/oss-security/2023/11/17/2","tags":["Mailing List","Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://wiki.zimbra.com/wiki/Security_Center","tags":["Release Notes"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://wiki.zimbra.com/wiki/Zimbra_Responsible_Disclosure_Policy","tags":["Not Applicable"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-37580","tags":["US Government Resource"],"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2023-37580","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}