CVE-2026-33368

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{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:synacor:zimbra_collaboration_suite:*:*:*:*:*:*:*:*", "matchCriteriaId": "E8DBE536-EAB0-48FF-A195-C0DB0A7FBCA0", "versionEndExcluding": "10.1.16", "versionStartIncluding": "10.0.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Zimbra Collaboration Suite (ZCS) 10.0 and 10.1 contains a reflected cross-site scripting (XSS) vulnerability in the Classic Webmail REST interface (/h/rest). The application fails to properly sanitize user-supplied input, allowing an unauthenticated attacker to inject malicious JavaScript into a crafted URL. When a victim user accesses the link, the injected script executes in the context of the Zimbra webmail application, which could allow the attacker to perform actions on behalf of the victim."}, {"lang": "es", "value": "Zimbra Collaboration Suite (ZCS) 10.0 y 10.1 contiene una vulnerabilidad de cross-site scripting (XSS) reflejada en la interfaz REST de Classic Webmail (/h/rest). La aplicaci\u00f3n no logra sanear correctamente la entrada proporcionada por el usuario, permitiendo a un atacante no autenticado inyectar JavaScript malicioso en una URL manipulada. Cuando un usuario v\u00edctima accede al enlace, el script inyectado se ejecuta en el contexto de la aplicaci\u00f3n de webmail de Zimbra, lo que podr\u00eda permitir al atacante realizar acciones en nombre de la v\u00edctima."}], "id": "CVE-2026-33368", "lastModified": "2026-06-17T10:37:22.937", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.1, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 2.7, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-33368", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-03-23T13:08:41.191532Z", "version": "2.0.3"}}]}, "published": "2026-03-20T14:16:15.810", "references": [{"source": "cve@mitre.org", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://wiki.zimbra.com/wiki/Security_Center"}, {"source": "cve@mitre.org", "tags": ["Release Notes"], "url": "https://wiki.zimbra.com/wiki/Zimbra_Releases/10.1.16#Security_Fixes"}, {"source": "cve@mitre.org", "tags": ["Product"], "url": "https://wiki.zimbra.com/wiki/Zimbra_Responsible_Disclosure_Policy"}, {"source": "cve@mitre.org", "tags": ["Vendor Advisory"], "url": "https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,10.0]"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,10.1]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "original": {"product": "n/a", "source": "cna", "vendor": "n/a"}, "product": "collaboration", "vendor": "zimbra"}], "analysis": {"en": {"generated_at": "2026-04-02T04:20:00.984685+00:00", "value": {"mitigation_remediation": ["Upgrade Zimbra Collaboration Suite to version 10.1.16 or newer, which contains the security fix.", "If upgrade is not immediately possible, block unauthenticated access to the /h/rest endpoint to prevent exploitation."], "summary": {"action": "Apply Patch", "impact": "Reflected XSS"}, "threat_synthesis": {"affected_systems": "Affected systems are Zimbra Collaboration Suite versions 10.0 and 10.1 from Synacor. No other versions were listed as vulnerable in the advisory.", "description_and_impact": "The Zimbra Collaboration Suite 10.0 and 10.1 contain a reflected cross\u2011site scripting vulnerability in the Classic Webmail REST interface (/h/rest). An unauthenticated attacker can embed malicious JavaScript in a crafted URL; when a victim opens that link, the script runs inside the webmail application context, allowing the attacker to act as the victim. This is a reflected XSS weakness identified as CWE\u201179.", "risk_and_exploitability": "The CVSS score is 6.1, indicating moderate severity, and the EPSS score is below 1%, suggesting low current exploitation probability. The vulnerability is not listed in CISA's KEV catalog, implying no known widespread exploitation at the time of reporting. Exploitation requires an unauthenticated attacker to lure a user to a crafted URL; the impact includes session hijacking or unauthorized actions within the webmail context. Overall, the risk is moderate but actionable mitigation is recommended."}}}}, "created": "2026-03-23T09:53:37.039784+00:00", "updated": "2026-04-02T07:59:42.502768+00:00", "vendors": ["zimbra", "zimbra$PRODUCT$collaboration"]}