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A Cross-Site Scripting (XSS) vulnerability in the Zimbra Classic UI allows attackers to execute arbitrary JavaScript within the user's session, potentially leading to unauthorized access to sensitive information. This issue arises from insufficient sanitization of HTML content, specifically involving crafted tag structures and attribute values that include an @import directive and other script injection vectors. The vulnerability is triggered when a user views a crafted e-mail message in the Classic UI, requiring no additional user interaction."}, {"lang": "es", "value": "Se descubri\u00f3 un problema en Zimbra Collaboration (ZCS) 8.8.15, 9.0, 10.0 y 10.1. Una vulnerabilidad de cross-site scripting (XSS) en la interfaz cl\u00e1sica de Zimbra permite a los atacantes ejecutar c\u00f3digo JavaScript arbitrario dentro de la sesi\u00f3n del usuario, lo que podr\u00eda provocar acceso no autorizado a informaci\u00f3n confidencial. Este problema se debe a una limpieza insuficiente del contenido HTML, en particular a estructuras de etiquetas y valores de atributos manipulados que incluyen la directiva @import y otros vectores de inyecci\u00f3n de scripts. La vulnerabilidad se activa cuando un usuario visualiza un mensaje de correo electr\u00f3nico manipulado en la interfaz cl\u00e1sica, sin necesidad de interacci\u00f3n adicional."}], "id": "CVE-2025-48700", "lastModified": "2026-04-21T12:48:23.763", "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"}]}, "published": "2025-06-23T15:15:27.930", "references": [{"source": "cve@mitre.org", "tags": ["Release Notes"], "url": "https://wiki.zimbra.com/wiki/Security_Center"}, {"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"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["US Government Resource"], "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-48700"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{}

{"analysis": {"en": {"generated_at": "2026-04-28T11:11:42.604931+00:00", "value": {"mitigation_remediation": ["Apply the latest vendor patch for Zimbra Collaboration Suite 8.8.15 or 9.0.0 that removes the vulnerable code.", "Configure the mail system to strip or block @import directives and script attributes from email bodies before they reach the Classic UI.", "Temporarily disable the Classic UI for all untrusted user accounts until the patch is in place."], "summary": {"action": "Immediate Patch", "impact": "Cross\u2011Site Scripting"}, "threat_synthesis": {"affected_systems": "The flaw affects Zimbra Collaboration Suite 8.8.15, 9.0.0, 10.0, and 10.1, all deployed by Synacor. The CPE list enumerates many patch releases for 8.8.15 and 9.0.0, while the description references 10.0 and 10.1.", "description_and_impact": "A Cross\u2011Site Scripting vulnerability exists in the Zimbra Classic UI, allowing an attacker to execute arbitrary JavaScript when a user views a crafted e\u2011mail message. The flaw stems from insufficient sanitization of HTML content, especially tag structures that include an @import directive or other script injection vectors. The resulting arbitrary code execution can lead to unauthorized access to sensitive information within the user's session. The vulnerability requires no additional user interaction beyond opening the mail.", "risk_and_exploitability": "The CVSS score of 6.1 indicates a moderate severity vulnerability, while an EPSS score of 20% indicates a lower probability that this vulnerability will be exploited in the wild. The vulnerability is listed in the CISA KEV catalog, underscoring its real\u2011world impact. Attackers can exploit it by sending a specially crafted email that a user opens in the Classic UI, with no further credentials or actions required."}}}}, "created": "2025-06-24T09:44:11.422768+00:00", "updated": "2026-04-28T11:15:26.097826+00:00", "vendors": ["zimbra", "zimbra$PRODUCT$zimbra"]}