{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-05-16T20:51:22.992","vulnerabilities":[{"cve":{"id":"CVE-2025-66376","sourceIdentifier":"cve@mitre.org","published":"2026-01-05T15:15:44.903","lastModified":"2026-03-18T20:13:37.087","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"Zimbra Collaboration (ZCS) 10 before 10.0.18 and 10.1 before 10.1.13 allows Classic UI stored XSS via Cascading Style Sheets (CSS) @import directives in an HTML e-mail message."}],"metrics":{"cvssMetricV31":[{"source":"cve@mitre.org","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N","baseScore":7.2,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"LOW","integrityImpact":"LOW","availabilityImpact":"NONE"},"exploitabilityScore":3.9,"impactScore":2.7},{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","baseScore":6.1,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"CHANGED","confidentialityImpact":"LOW","integrityImpact":"LOW","availabilityImpact":"NONE"},"exploitabilityScore":2.8,"impactScore":2.7}]},"cisaExploitAdd":"2026-03-18","cisaActionDue":"2026-04-01","cisaRequiredAction":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","cisaVulnerabilityName":"Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting Vulnerability","weaknesses":[{"source":"cve@mitre.org","type":"Secondary","description":[{"lang":"en","value":"CWE-79"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:synacor:zimbra_collaboration_suite:*:*:*:*:*:*:*:*","versionStartIncluding":"10.0.0","versionEndExcluding":"10.0.18","matchCriteriaId":"7D423DB3-FCD4-445F-A778-BC5F83E01953"},{"vulnerable":true,"criteria":"cpe:2.3:a:synacor:zimbra_collaboration_suite:*:*:*:*:*:*:*:*","versionStartIncluding":"10.1.0","versionEndExcluding":"10.1.13","matchCriteriaId":"7C3F6B1E-1671-461B-A093-7B6854C227FE"}]}]}],"references":[{"url":"https://wiki.zimbra.com/wiki/Security_Center","source":"cve@mitre.org","tags":["Release Notes","Vendor Advisory"]},{"url":"https://wiki.zimbra.com/wiki/Zimbra_Releases/10.0.18#Security_Fixes","source":"cve@mitre.org","tags":["Release Notes"]},{"url":"https://wiki.zimbra.com/wiki/Zimbra_Releases/10.1.13#Security_Fixes","source":"cve@mitre.org","tags":["Release Notes"]},{"url":"https://wiki.zimbra.com/wiki/Zimbra_Responsible_Disclosure_Policy","source":"cve@mitre.org","tags":["Product"]},{"url":"https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories","source":"cve@mitre.org","tags":["Vendor Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-66376","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","tags":["US Government Resource"]}]}}]}