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CVE-2026-33368

Estado: AnalizadaMedia (6.1)—

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.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Synacor — Zimbra Collaboration Suite

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-33368",
  "cveTags": [],
  "metrics": {
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-33368",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-03-23T13:08:41.191532Z"
        }
      }
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    "cvssMetricV31": [
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          "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"
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  "affected": [
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  "published": "2026-03-20T14:16:15.810",
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      "description": [
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          "value": "CWE-79"
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  ],
  "descriptions": [
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      "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."
    },
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      "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 aplicación 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 víctima accede al enlace, el script inyectado se ejecuta en el contexto de la aplicación de webmail de Zimbra, lo que podría permitir al atacante realizar acciones en nombre de la víctima."
    }
  ],
  "lastModified": "2026-06-17T10:37:22.937",
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