CVE-2025-66376

{"id": "CVE-2025-66376", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "cve@mitre.org", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 7.2, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}, "impactScore": 2.7, "exploitabilityScore": 3.9}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 6.1, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}, "impactScore": 2.7, "exploitabilityScore": 2.8}]}, "published": "2026-01-05T15:15:44.903", "references": [{"url": "https://wiki.zimbra.com/wiki/Security_Center", "tags": ["Release Notes", "Vendor Advisory"], "source": "cve@mitre.org"}, {"url": "https://wiki.zimbra.com/wiki/Zimbra_Releases/10.0.18#Security_Fixes", "tags": ["Release Notes"], "source": "cve@mitre.org"}, {"url": "https://wiki.zimbra.com/wiki/Zimbra_Releases/10.1.13#Security_Fixes", "tags": ["Release Notes"], "source": "cve@mitre.org"}, {"url": "https://wiki.zimbra.com/wiki/Zimbra_Responsible_Disclosure_Policy", "tags": ["Product"], "source": "cve@mitre.org"}, {"url": "https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories", "tags": ["Vendor Advisory"], "source": "cve@mitre.org"}, {"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-66376", "tags": ["US Government Resource"], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "cve@mitre.org", "description": [{"lang": "en", "value": "CWE-79"}]}], "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."}], "lastModified": "2026-03-18T20:13:37.087", "cisaActionDue": "2026-04-01", "cisaExploitAdd": "2026-03-18", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:synacor:zimbra_collaboration_suite:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7D423DB3-FCD4-445F-A778-BC5F83E01953", "versionEndExcluding": "10.0.18", "versionStartIncluding": "10.0.0"}, {"criteria": "cpe:2.3:a:synacor:zimbra_collaboration_suite:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7C3F6B1E-1671-461B-A093-7B6854C227FE", "versionEndExcluding": "10.1.13", "versionStartIncluding": "10.1.0"}], "operator": "OR"}]}], "sourceIdentifier": "cve@mitre.org", "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"}