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CVE-2014-4721

Status: ModifiedLow (2.6)—
Severity2.6Low · CVSS 2.0
Exploitation probability5.87 %higher than 93% of CVEs
Active exploitationNonot in the CISA catalog
Public exploitNot knownno public code found

The phpinfo implementation in ext/standard/info.c in PHP before 5.4.30 and 5.5.x before 5.5.14 does not ensure use of the string data type for the PHP_AUTH_PW, PHP_AUTH_TYPE, PHP_AUTH_USER, and PHP_SELF variables, which might allow context-dependent attackers to obtain sensitive information from process memory by using the integer data type with crafted values, related to a "type confusion" vulnerability, as demonstrated by reading a private SSL key in an Apache HTTP Server web-hosting environment with mod_ssl and a PHP 5.3.x mod_php.

CVSS

Base score
2.6
Version
2.0
Vector
AV:N/AC:H/Au:N/C:P/I:N/A:N

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days
5.87 %
Percentile among all scored CVEs
93
Score date
10/21/2026

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 LinuxPHP — PHP

CWEs

References

Show 28 references

Raw JSON (NVD)

Show
{
  "id": "CVE-2014-4721",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
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          "baseScore": 2.6,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:H/Au:N/C:P/I:N/A:N",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "HIGH",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "LOW",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 4.9,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ]
  },
  "affected": [
    {
      "source": "security@debian.org",
      "affectedData": [
        {
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          "product": "n/a",
          "versions": [
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              "version": "n/a"
            }
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        }
      ]
    }
  ],
  "published": "2014-07-06T23:55:02.707",
  "references": [
    {
      "url": "http://lists.opensuse.org/opensuse-updates/2014-07/msg00035.html",
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    {
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      "tags": [
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    {
      "url": "http://www.php.net/ChangeLog-5.php",
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    },
    {
      "url": "https://www.sektioneins.de/en/blog/14-07-04-phpinfo-infoleak.html",
      "tags": [
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      "source": "security@debian.org"
    },
    {
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    {
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-200"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The phpinfo implementation in ext/standard/info.c in PHP before 5.4.30 and 5.5.x before 5.5.14 does not ensure use of the string data type for the PHP_AUTH_PW, PHP_AUTH_TYPE, PHP_AUTH_USER, and PHP_SELF variables, which might allow context-dependent attackers to obtain sensitive information from process memory by using the integer data type with crafted values, related to a \"type confusion\" vulnerability, as demonstrated by reading a private SSL key in an Apache HTTP Server web-hosting environment with mod_ssl and a PHP 5.3.x mod_php."
    },
    {
      "lang": "es",
      "value": "La implementación phpinfo en ext/standard/info.c en PHP anterior a 5.4.30 y 5.5.x anterior a 5.5.14 no asegura el uso del tipo de datos de cadenas para las variables PHP_AUTH_PW, PHP_AUTH_TYPE, PHP_AUTH_USER y PHP_SELF, lo que podría permitir a atacantes dependientes de contexto obtener información sensible de la memoria de proceso mediante el uso de el tipo de datos de enteros con valores manipulados, relacionado con una vulnerabilidad de 'confusión de tipo', tal y como fue demostrado mediante la lectura de una clave SSL privada en un entorno de alojamiento web de Apache HTTP Server con mod_ssl y un 5.3.x mod_php de PHP."
    }
  ],
  "lastModified": "2026-06-17T00:10:30.503",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:php:php:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "B61C8E39-DB8E-4636-91E5-2473B0915FBD",
              "versionEndExcluding": "5.3.29",
              "versionStartIncluding": "5.3.0"
            },
            {
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              "matchCriteriaId": "AD052020-AA37-4F49-A0FE-EA99616C12C7",
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            },
            {
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              "matchCriteriaId": "C11E6FB0-C8C0-4527-9AA0-CB9B316F8F43"
            }
          ],
          "operator": "OR"
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  "sourceIdentifier": "security@debian.org"
}