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CVE-2021-21647

Estado: ModificadaMedia (4.3)—

Jenkins CloudBees CD Plugin 1.1.21 and earlier does not perform a permission check in an HTTP endpoint, allowing attackers with Item/Read permission to schedule builds of projects without having Item/Build permission.

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)

Jenkins — Cloudbees CD

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-21647",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 4,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:S/C:N/I:P/A:N",
          "authentication": "SINGLE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
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  "affected": [
    {
      "source": "jenkinsci-cert@googlegroups.com",
      "affectedData": [
        {
          "vendor": "Jenkins project",
          "product": "Jenkins CloudBees CD Plugin",
          "versions": [
            {
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom",
              "lessThanOrEqual": "1.1.21"
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            {
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              "version": "1.1.18.1"
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  "published": "2021-04-21T15:15:08.477",
  "references": [
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      "url": "http://www.openwall.com/lists/oss-security/2021/04/21/2",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
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      "source": "jenkinsci-cert@googlegroups.com"
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      "url": "https://www.jenkins.io/security/advisory/2021-04-21/#SECURITY-2309",
      "tags": [
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      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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  "vulnStatus": "Modified",
  "descriptions": [
    {
      "lang": "en",
      "value": "Jenkins CloudBees CD Plugin 1.1.21 and earlier does not perform a permission check in an HTTP endpoint, allowing attackers with Item/Read permission to schedule builds of projects without having Item/Build permission."
    },
    {
      "lang": "es",
      "value": "Jenkins CloudBees CD Plugin versiones 1.1.21 y anteriores, no llevan a cabo una comprobación de permisos en un endpoint HTTP, permitiendo a atacantes con permiso Item/Read programar compilaciones de proyectos sin tener permiso Item/Build"
    }
  ],
  "lastModified": "2026-06-17T03:35:55.817",
  "configurations": [
    {
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          "negate": false,
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  "sourceIdentifier": "jenkinsci-cert@googlegroups.com"
}