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CVE-2018-20151

Status: ModifiedHigh (7.5)—

In WordPress before 4.9.9 and 5.x before 5.0.1, the user-activation page could be read by a search engine's web crawler if an unusual configuration were chosen. The search engine could then index and display a user's e-mail address and (rarely) the password that was generated by default.

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 (2)

Debian — Debian LinuxWordpress — Wordpress

CWEs

References

Raw JSON (NVD)

Show
{
  "id": "CVE-2018-20151",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV30": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.0",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
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              "status": "affected",
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  ],
  "published": "2018-12-14T20:29:00.517",
  "references": [
    {
      "url": "http://www.securityfocus.com/bid/106220",
      "tags": [
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        "VDB Entry"
      ],
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    },
    {
      "url": "https://codex.wordpress.org/Version_4.9.9",
      "tags": [
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        "Vendor Advisory"
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      "source": "cve@mitre.org"
    },
    {
      "url": "https://lists.debian.org/debian-lts-announce/2019/02/msg00019.html",
      "tags": [
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        "Third Party Advisory"
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    {
      "url": "https://wordpress.org/news/2018/12/wordpress-5-0-1-security-release/",
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    {
      "url": "https://wordpress.org/support/wordpress-version/version-5-0-1/",
      "tags": [
        "Release Notes",
        "Vendor Advisory"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "https://wpvulndb.com/vulnerabilities/9174",
      "tags": [
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      "source": "cve@mitre.org"
    },
    {
      "url": "https://www.debian.org/security/2019/dsa-4401",
      "tags": [
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    },
    {
      "url": "https://www.zdnet.com/article/wordpress-plugs-bug-that-led-to-google-indexing-some-user-passwords/",
      "tags": [
        "Press/Media Coverage",
        "Third Party Advisory"
      ],
      "source": "cve@mitre.org"
    },
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      "tags": [
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    },
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      "url": "https://codex.wordpress.org/Version_4.9.9",
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    },
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    {
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    },
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      "url": "https://wpvulndb.com/vulnerabilities/9174",
      "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"
    },
    {
      "url": "https://www.zdnet.com/article/wordpress-plugs-bug-that-led-to-google-indexing-some-user-passwords/",
      "tags": [
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        "Third Party Advisory"
      ],
      "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": "In WordPress before 4.9.9 and 5.x before 5.0.1, the user-activation page could be read by a search engine's web crawler if an unusual configuration were chosen. The search engine could then index and display a user's e-mail address and (rarely) the password that was generated by default."
    },
    {
      "lang": "es",
      "value": "En WordPress, en versiones anteriores a la 4.9.9 y versiones 5.x anteriores a la 5.0.1, la página de activación de usuarios podría ser leída por el crawler web de un motor de búsqueda si se elige una configuración inusual. El motor de búsqueda podría listar y mostrar la dirección de email de un usuario y (raramente) la contraseña que se generó por defecto."
    }
  ],
  "lastModified": "2026-06-17T01:52:21.150",
  "configurations": [
    {
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        {
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              "versionEndExcluding": "4.9.9"
            },
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              "vulnerable": true,
              "matchCriteriaId": "5CCEB112-4070-4BB4-8974-C289FAF79E79",
              "versionEndExcluding": "5.0.1",
              "versionStartIncluding": "5.0"
            }
          ],
          "operator": "OR"
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      "nodes": [
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              "criteria": "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*",
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            },
            {
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              "vulnerable": true,
              "matchCriteriaId": "DEECE5FC-CACF-4496-A3E7-164736409252"
            }
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          "operator": "OR"
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  ],
  "sourceIdentifier": "cve@mitre.org"
}