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CVE-2021-21365

Estado: ModificadaMedia (5.4)—

Bootstrap Package is a theme for TYPO3. It has been discovered that rendering content in the website frontend is vulnerable to cross-site scripting. A valid backend user account is needed to exploit this vulnerability. Users of the extension, who have overwritten the affected templates with custom code must manually apply the security fix. Update to version 7.1.2, 8.0.8, 9.1.4, 10.0.10 or 11.0.3 of the Bootstrap Package that fix the problem described. Updated version are available from the TYPO3 extension manager, Packagist and at https://extensions.typo3.org/extension/download/bootstrap_package/.

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)

Typo3 — Typo3

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-21365",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 3.5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:S/C:N/I:P/A:N",
          "authentication": "SINGLE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "LOW",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 6.8,
        "obtainUserPrivilege": false,
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          "version": "3.1",
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          "baseSeverity": "MEDIUM",
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          "integrityImpact": "LOW",
          "userInteraction": "REQUIRED",
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          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "LOW"
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        "impactScore": 2.7,
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        "type": "Primary",
        "source": "nvd@nist.gov",
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N",
          "integrityImpact": "LOW",
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          "confidentialityImpact": "LOW"
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        "exploitabilityScore": 2.3
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  "affected": [
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      "affectedData": [
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              "version": ">= 11.0.0, < 11.0.3"
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  ],
  "published": "2021-04-27T20:15:08.713",
  "references": [
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      "tags": [
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    {
      "url": "https://typo3.org/security/advisory/typo3-ext-sa-2021-007",
      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
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      "url": "https://github.com/benjaminkott/bootstrap_package/security/advisories/GHSA-p48w-vf3c-rqjx",
      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Bootstrap Package is a theme for TYPO3. It has been discovered that rendering content in the website frontend is vulnerable to cross-site scripting. A valid backend user account is needed to exploit this vulnerability. Users of the extension, who have overwritten the affected templates with custom code must manually apply the security fix. Update to version 7.1.2, 8.0.8, 9.1.4, 10.0.10 or 11.0.3 of the Bootstrap Package that fix the problem described. Updated version are available from the TYPO3 extension manager, Packagist and at https://extensions.typo3.org/extension/download/bootstrap_package/."
    },
    {
      "lang": "es",
      "value": "Bootstrap Package es un tema para TYPO3.&#xa0;Se ha descubierto que la renderización de contenido en la interfaz del sitio web es vulnerable a ataques de tipo cross-site scripting.&#xa0;Es necesario una cuenta de usuario de backend válida para explotar esta vulnerabilidad.&#xa0;Los usuarios de la extensión que hayan sobrescrito las plantillas afectadas con código personalizado deben aplicar manualmente la corrección de seguridad.&#xa0;Actualiza a versiones 7.1.2, 8.0.8, 9.1.4, 10.0.10 o 11.0.3 del paquete Bootstrap que corrige el problema descrito.&#xa0;La versión actualizada está disponible en el administrador de extensiones TYPO3, Packagist y en https://extensions.typo3.org/extension/download/bootstrap_package/"
    }
  ],
  "lastModified": "2026-06-17T03:35:23.893",
  "configurations": [
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