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CVE-2024-45399

Estado: AnalizadaMedia (6.1)—

Indico is an event management system that uses Flask-Multipass, a multi-backend authentication system for Flask. In Indico prior to version 3.3.4, corresponding to Flask-Multipass prior to version 0.5.5, there is a Cross-Site-Scripting vulnerability during account creation when redirecting to the `next` URL. Exploitation requires initiating the account creation process with a maliciously crafted link, and then finalizing the signup process. Because of this, it can only target newly created (and thus unprivileged) Indico users.

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Indico 3.3.4 upgrades the dependency on Flask-Multipass to version 0.5.5, which fixes the issue. Those who build the Indico package themselves and cannot upgrade can update the `flask-multipass` dependency to `>=0.5.5` which fixes the vulnerability. Otherwise one could configure one's web server to disallow requests containing a query string with a `next` parameter that starts with `javascript:`.

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)

Cern — Indico

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2024-45399",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2024-45399",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2024-09-04T20:17:25.903426Z"
        }
      }
    ],
    "cvssMetricV31": [
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          "version": "3.1",
          "baseScore": 4.3,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 1.4,
        "exploitabilityScore": 2.8
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
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          "baseScore": 6.1,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
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              "version": "< 3.3.4"
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  "published": "2024-09-04T20:15:09.257",
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      "url": "https://github.com/indico/flask-multipass/commit/0bdcf656d469e5f675cb56fd644d82fea3a97c2a",
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  "weaknesses": [
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      "description": [
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          "value": "CWE-79"
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  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Indico is an event management system that uses Flask-Multipass, a multi-backend authentication system for Flask. In Indico prior to version 3.3.4, corresponding to Flask-Multipass prior to version 0.5.5, there is a Cross-Site-Scripting vulnerability during account creation when redirecting to the `next` URL. Exploitation requires initiating the account creation process with a maliciously crafted link, and then finalizing the signup process. Because of this, it can only target newly created (and thus unprivileged) Indico users. Indico 3.3.4 upgrades the dependency on Flask-Multipass to version 0.5.5, which fixes the issue. Those who build the Indico package themselves and cannot upgrade can update the `flask-multipass` dependency to `>=0.5.5` which fixes the vulnerability. Otherwise one could configure one's web server to disallow requests containing a query string with a `next` parameter that starts with `javascript:`."
    },
    {
      "lang": "es",
      "value": "Indico es un sistema de gestión de eventos que utiliza Flask-Multipass, un sistema de autenticación multi-backend para Flask. En Indico anterior a la versión 3.3.4, correspondiente a Flask-Multipass anterior a la versión 0.5.5, existe una vulnerabilidad de Cross-Site-Scripting durante la creación de la cuenta al redireccionar a la URL `next`. La explotación requiere iniciar el proceso de creación de la cuenta con un enlace creado con fines malintencionados y luego finalizar el proceso de registro. Debido a esto, solo puede apuntar a usuarios de Indico recién creados (y por lo tanto sin privilegios). Indico 3.3.4 actualiza la dependencia de Flask-Multipass a la versión 0.5.5, que corrige el problema. Aquellos que construyen el paquete Indico ellos mismos y no pueden actualizar pueden actualizar la dependencia `flask-multipass` a `&gt;=0.5.5` que corrige la vulnerabilidad. De lo contrario, uno podría configurar su servidor web para rechazar solicitudes que contengan una cadena de consulta con un parámetro `next` que comience con `javascript:`."
    }
  ],
  "lastModified": "2026-06-17T07:54:08.377",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "vulnerable": true,
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              "versionEndExcluding": "3.3.4"
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  "sourceIdentifier": "security-advisories@github.com"
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