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CVE-2020-15187

Status: ModifiedMedium (4.7)—

In Helm before versions 2.16.11 and 3.3.2, a Helm plugin can contain duplicates of the same entry, with the last one always used. If a plugin is compromised, this lowers the level of access that an attacker needs to modify a plugin's install hooks, causing a local execution attack. To perform this attack, an attacker must have write access to the git repository or plugin archive (.tgz) while being downloaded (which can occur during a MITM attack on a non-SSL connection). This issue has been patched in Helm 2.16.11 and Helm 3.3.2. As a possible workaround make sure to install plugins using a secure connection protocol like SSL.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (1)

Helm — Helm

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2020-15187",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 6.5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:S/C:P/I:P/A:P",
          "authentication": "SINGLE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
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    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 3,
          "attackVector": "NETWORK",
          "baseSeverity": "LOW",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:N/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "REQUIRED",
          "attackComplexity": "HIGH",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
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        "impactScore": 1.4,
        "exploitabilityScore": 1.3
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 4.7,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L",
          "integrityImpact": "LOW",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "LOW",
          "privilegesRequired": "HIGH",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 3.4,
        "exploitabilityScore": 1.2
      }
    ]
  },
  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "helm",
          "product": "helm",
          "versions": [
            {
              "status": "affected",
              "version": ">= 2.0.0, < 2.16.11"
            },
            {
              "status": "affected",
              "version": ">= 3.0.0, < 3.3.2"
            }
          ]
        }
      ]
    }
  ],
  "published": "2020-09-17T22:15:12.647",
  "references": [
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      "url": "https://github.com/helm/helm/commit/6aab63765f99050b115f0aec3d6350c85e8da946",
      "source": "security-advisories@github.com"
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      "url": "https://github.com/helm/helm/commit/ac7c07c37d87e09797f714fb57aa5e9cb99d9450",
      "source": "security-advisories@github.com"
    },
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      "url": "https://github.com/helm/helm/commit/b0296c0522e837d65f944beefa3fb64fd08ac304",
      "source": "security-advisories@github.com"
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    {
      "url": "https://github.com/helm/helm/commit/c8d6b01d72c9604e43ee70d0d78fadd54c2d8499",
      "source": "security-advisories@github.com"
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      "tags": [
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      "source": "security-advisories@github.com"
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    {
      "url": "https://github.com/helm/helm/commit/f2ede29480b507b7d8bb152dd8b6b86248b00658",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/helm/helm/security/advisories/GHSA-c52f-pq47-2r9j",
      "tags": [
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      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/helm/helm/commit/d9ef5ce8bad512e325390c0011be1244b8380e4b",
      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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    {
      "url": "https://github.com/helm/helm/security/advisories/GHSA-c52f-pq47-2r9j",
      "tags": [
        "Third Party Advisory"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-74"
        },
        {
          "lang": "en",
          "value": "CWE-694"
        }
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    },
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      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-Other"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In Helm before versions 2.16.11 and 3.3.2, a Helm plugin can contain duplicates of the same entry, with the last one always used. If a plugin is compromised, this lowers the level of access that an attacker needs to modify a plugin's install hooks, causing a local execution attack.\nTo perform this attack, an attacker must have write access to the git repository or plugin archive (.tgz) while being downloaded (which can occur during a MITM attack on a non-SSL connection). This issue has been patched in Helm 2.16.11 and Helm 3.3.2.\nAs a possible workaround make sure to install plugins using a secure connection protocol like SSL."
    },
    {
      "lang": "es",
      "value": "En Helm versiones anteriores a 2.16.11 y 3.3.2, un plugin de Helm puede contener duplicados de la misma entrada, y siempre se usa la última.&#xa0;Si un plugin está comprometido, esto reduce el nivel de acceso que un atacante necesita para modificar los hooks de instalación de un plugin, causando un ataque de ejecución local.&#xa0;Para llevar a cabo este ataque, un atacante necesita tener acceso de escritura al repositorio de git o al archivo de plugins (.tgz) mientras está siendo descargado (lo que puede ocurrir durante un ataque de tipo MITM en una conexión no SSL).&#xa0;Este problema ha sido corregido en Helm versión 2.16.11 y Helm versión 3.3.2.&#xa0;Como posible solución, asegúrese de instalar plugins usando un protocolo de conexión seguro como SSL"
    }
  ],
  "lastModified": "2026-06-17T02:56:13.427",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:helm:helm:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "455BCCE5-1D43-4E59-9591-E84B52DAAF0B",
              "versionEndExcluding": "2.16.11",
              "versionStartIncluding": "2.0.0"
            },
            {
              "criteria": "cpe:2.3:a:helm:helm:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "B462D769-3FC0-4079-8B48-863F013662EF",
              "versionEndExcluding": "3.3.2",
              "versionStartIncluding": "3.0.0"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "security-advisories@github.com"
}