CVE-2026-21618

Estado: ModificadaAlta (8.5)—

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in hexpm hexpm/hexpm ('Elixir.HexpmWeb.SharedAuthorizationView' modules) allows Cross-Site Scripting (XSS). This vulnerability is associated with program files lib/hexpm_web/views/shared_authorization_view.ex and program routines 'Elixir.HexpmWeb.SharedAuthorizationView':render_grouped_scopes/3.

This issue affects hexpm: from 617e44c71f1dd9043870205f371d375c5c4d886d before c692438684ead90c3bcbfb9ccf4e63c768c668a8; hex.pm: from 2025-10-01 before 2026-01-19.

CVSS

Versión: 4.0
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Puntuación base: 8.5

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.26%
Percentil entre todas las CVEs puntuadas: 16
Fecha de la puntuación: 6/10/2026

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.

ExplotaciónT1189 Drive-by Compromiseinitial access95 %
Impacto principalT1059.007 JavaScriptexecution85 %

XSS en formulario de autorización (CWE-79, UI:A) permite inyectar JavaScript en navegador del usuario. Vector CVSS N/UI:A y descripción explícita de 'Cross-Site Scripting' confirman T1189.

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 Content User Training Execution Prevention Behavior Prevention on Endpoint Disable or Remove Feature or Program Application Isolation and Sandboxing

Tecnologías afectadas (1)

HEX — Hexpm

CWE

CWE-79

Referencias

JSON original (NVD)

Mostrar

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  "published": "2026-01-19T15:15:50.693",
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    {
      "lang": "en",
      "value": "Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in hexpm hexpm/hexpm ('Elixir.HexpmWeb.SharedAuthorizationView' modules) allows Cross-Site Scripting (XSS). This vulnerability is associated with program files lib/hexpm_web/views/shared_authorization_view.ex and program routines 'Elixir.HexpmWeb.SharedAuthorizationView':render_grouped_scopes/3.\n\nThis issue affects hexpm: from 617e44c71f1dd9043870205f371d375c5c4d886d before c692438684ead90c3bcbfb9ccf4e63c768c668a8; hex.pm: from 2025-10-01 before 2026-01-19."
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      "value": "Neutralización Inadecuada de la Entrada Durante la Generación de Páginas Web (XSS o 'cross-site scripting') vulnerabilidad en hexpm hexpm/hexpm (módulos 'Elixir.HexpmWeb.SharedAuthorizationView') permite cross-site scripting (XSS). Esta vulnerabilidad está asociada con los archivos de programa lib/hexpm_web/views/shared_authorization_view.ex y las rutinas de programa 'Elixir.HexpmWeb.SharedAuthorizationView':render_grouped_scopes/3.\n\nEste problema afecta a hexpm: desde 617e44c71f1dd9043870205f371d375c5c4d886d antes de c692438684ead90c3bcbfb9ccf4e63c768c668a8, desde pkg:github/hexpm/hexpm@617e44c71f1dd9043870205f371d375c5c4d886d antes de pkg:github/hexpm/hexpm@c692438684ead90c3bcbfb9ccf4e63c768c668a8; hex.pm: desde 2025-10-01 antes de 2026-01-19."
    }
  ],
  "lastModified": "2026-07-24T15:17:13.543",
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