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CVE-2025-3246

Estado: AnalizadaAlta (8.6)—

An improper neutralization of input vulnerability was identified in GitHub Enterprise Server that allowed cross-site scripting in GitHub Markdown that used `$$..$$` math blocks. Exploitation required access to the target GitHub Enterprise Server instance and privileged user interaction with the malicious elements. This vulnerability affected version 3.16.1 of GitHub Enterprise Server and was fixed in version 3.16.2. This vulnerability was reported via the GitHub Bug Bounty program.

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).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

XSS en bloques Markdown (CWE-79) típicamente implícito en navegador; impacto JavaScript ejecutado en contexto del navegador víctima con sesión autenticada.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Restrict Web-Based ContentUser TrainingExecution PreventionBehavior Prevention on EndpointDisable or Remove Feature or ProgramApplication Isolation and Sandboxing

Tecnologías afectadas (1)

Github — Enterprise Server

CWE

Referencias

JSON original (NVD)

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        "type": "Secondary",
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          "modifiedVulnConfidentialityImpact": "NOT_DEFINED"
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              "versionType": "semver",
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  "published": "2025-04-17T23:15:42.123",
  "references": [
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      "tags": [
        "Release Notes"
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      "source": "product-cna@github.com"
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  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "type": "Secondary",
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      "description": [
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          "value": "CWE-79"
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      "lang": "en",
      "value": "An improper neutralization of input vulnerability was identified in GitHub Enterprise Server that allowed cross-site scripting in GitHub Markdown that used `$$..$$` math blocks.  Exploitation required access to the target GitHub Enterprise Server instance and privileged user interaction with the malicious elements. This vulnerability affected version 3.16.1 of GitHub Enterprise Server and was fixed in version 3.16.2. This vulnerability was reported via the GitHub Bug Bounty program."
    },
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      "lang": "es",
      "value": "Se identificó una vulnerabilidad de neutralización de entrada incorrecta en GitHub Enterprise Server que permitía cross-site scripting en GitHub Markdown que utilizaban bloques matemáticos `$$..$$`. Su explotación requería acceso a la instancia de GitHub Enterprise Server objetivo e interacción de usuario privilegiado con los elementos maliciosos. Esta vulnerabilidad afectó a la versión 3.16.1 de GitHub Enterprise Server y se corrigió en la versión 3.16.2. Esta vulnerabilidad se reportó a través del programa de recompensas por errores de GitHub."
    }
  ],
  "lastModified": "2026-06-17T09:19:30.637",
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