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CVE-2016-5201

Status: ModifiedMedium (6.5)—

A leak of privateClass in the extensions API in Google Chrome prior to 54.0.2840.100 for Linux, and 54.0.2840.99 for Windows, and 54.0.2840.98 for Mac allowed a remote attacker to access privileged JavaScript code via a crafted HTML page.

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)

Google — Chrome

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2016-5201",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 4.3,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:P/I:N/A:N",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": true
      }
    ],
    "cvssMetricV30": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.0",
          "baseScore": 6.5,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "chrome-cve-admin@google.com",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "Google Chrome prior to 54.0.2840.100 for Linux, and 54.0.2840.99 for Windows, and 54.0.2840.98 for Mac",
          "versions": [
            {
              "status": "affected",
              "version": "Google Chrome prior to 54.0.2840.100 for Linux, and 54.0.2840.99 for Windows, and 54.0.2840.98 for Mac"
            }
          ]
        }
      ]
    }
  ],
  "published": "2017-01-19T05:59:00.323",
  "references": [
    {
      "url": "http://rhn.redhat.com/errata/RHSA-2016-2718.html",
      "source": "chrome-cve-admin@google.com"
    },
    {
      "url": "http://www.securityfocus.com/bid/94196",
      "source": "chrome-cve-admin@google.com"
    },
    {
      "url": "http://www.securitytracker.com/id/1037273",
      "source": "chrome-cve-admin@google.com"
    },
    {
      "url": "https://chromereleases.googleblog.com/2016/11/stable-channel-update-for-desktop_9.html",
      "source": "chrome-cve-admin@google.com"
    },
    {
      "url": "https://crbug.com/660678",
      "source": "chrome-cve-admin@google.com"
    },
    {
      "url": "https://security.gentoo.org/glsa/201611-16",
      "source": "chrome-cve-admin@google.com"
    },
    {
      "url": "http://rhn.redhat.com/errata/RHSA-2016-2718.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.securityfocus.com/bid/94196",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.securitytracker.com/id/1037273",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://chromereleases.googleblog.com/2016/11/stable-channel-update-for-desktop_9.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://crbug.com/660678",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://security.gentoo.org/glsa/201611-16",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-200"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A leak of privateClass in the extensions API in Google Chrome prior to 54.0.2840.100 for Linux, and 54.0.2840.99 for Windows, and 54.0.2840.98 for Mac allowed a remote attacker to access privileged JavaScript code via a crafted HTML page."
    },
    {
      "lang": "es",
      "value": "Un fuga de privateClass en la API de extensiones en Google Chrome anterior a 54.0.2840.100 para Linux y 54.0.2840.99 para Windows y 54.0.2840.98 para Mac permitió a un atacante remoto acceder a código JavaScript privilegiado a través de una página HTML manipulada."
    }
  ],
  "lastModified": "2026-06-17T00:48:58.007",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "8E02D434-11DB-4554-8DFE-6089B54B9647",
              "versionEndIncluding": "54.0.2840.87"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "chrome-cve-admin@google.com"
}