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CVE-2025-66458

Estado: AnalizadaMedia (5.3)—

Lookyloo is a web interface that allows users to capture a website page and then display a tree of domains that call each other. Prior to 1.35.3, there are multiple XSS due to unsafe use of f-strings in Markup. The issue requires a malicious 3rd party server responding with a JSON document containing JS code in a script element. This vulnerability is fixed in 1.35.3.

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)

Lookyloo — Lookyloo

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2025-66458",
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          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
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            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
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          "version": "2.0.3",
          "timestamp": "2025-12-02T19:26:42.155200Z"
        }
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    "cvssMetricV31": [
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          "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,
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    ],
    "cvssMetricV40": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
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          "version": "4.0",
          "Recovery": "NOT_DEFINED",
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          "valueDensity": "NOT_DEFINED",
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          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED"
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      "affectedData": [
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          "versions": [
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  "published": "2025-12-02T19:15:52.850",
  "references": [
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      "url": "https://github.com/Lookyloo/lookyloo/commit/b6ee2fee0afff0b35f37dd891bbce9d53ed8a290",
      "tags": [
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      "url": "https://github.com/Lookyloo/lookyloo/security/advisories/GHSA-58h2-652v-gq87",
      "tags": [
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        "Vendor Advisory"
      ],
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  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
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      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ]
    }
  ],
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      "value": "Lookyloo is a web interface that allows users to capture a website page and then display a tree of domains that call each other. Prior to 1.35.3, there are multiple XSS due to unsafe use of f-strings in Markup. The issue requires a malicious 3rd party server responding with a JSON document containing JS code in a script element. This vulnerability is fixed in 1.35.3."
    },
    {
      "lang": "es",
      "value": "Lookyloo es una interfaz web que permite a los usuarios capturar una página web y luego mostrar un árbol de dominios que se llaman entre sí. Versiones anteriores a 1.35.3, existen múltiples XSS debido al uso inseguro de f-strings en Markup. El problema requiere un servidor malicioso de terceros que responda con un documento JSON que contenga código JS en un elemento script. Esta vulnerabilidad está corregida en 1.35.3."
    }
  ],
  "lastModified": "2026-09-25T23:10:00.463",
  "configurations": [
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