CVE-2012-0830

Status: ModifiedHigh (7.5)—Exploit

Severity7.5High · CVSS 2.0

Exploitation probability30 %higher than 98% of CVEs

Active exploitationNonot in the CISA catalog

Public exploitAvailablePublished on Exploit-DB

The php_register_variable_ex function in php_variables.c in PHP 5.3.9 allows remote attackers to execute arbitrary code via a request containing a large number of variables, related to improper handling of array variables. NOTE: this vulnerability exists because of an incorrect fix for CVE-2011-4885.

CVSS

Base score: 7.5
Version: 2.0
Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 30 %
Percentile among all scored CVEs: 98
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).

Public exploits

Exploit code or detection templates are publicly available. This is not the same as confirmed active exploitation (KEV), but it raises the risk: patch with priority.

Published on Exploit-DB · PHP 5.4.0RC6 (x64) - Denial of Service (2/4/2012)

Affected technologies (1)

PHP — PHP

CWEs

CWE-399

References

Show 46 references

Raw JSON (NVD)

Show

{
  "id": "CVE-2012-0830",
  "cveTags": [],
  "metrics": {
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      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 7.5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ]
  },
  "affected": [
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      "affectedData": [
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          "versions": [
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              "version": "n/a"
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  ],
  "published": "2012-02-06T20:55:03.080",
  "references": [
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      "url": "http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c03360041",
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      "url": "http://lists.apple.com/archives/security-announce/2012/May/msg00001.html",
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      "url": "http://www.php.net/ChangeLog-5.php#5.3.10",
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  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-399"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The php_register_variable_ex function in php_variables.c in PHP 5.3.9 allows remote attackers to execute arbitrary code via a request containing a large number of variables, related to improper handling of array variables.  NOTE: this vulnerability exists because of an incorrect fix for CVE-2011-4885."
    },
    {
      "lang": "es",
      "value": "La función php_register_variable_ex en php_variables.c en PHP v5.3.9 permite a atacantes remotos ejecutar código de su elección a través de una solicitud que contenga un gran número de variable. Se trata de un problema relacionado con el manejo inadecuado de las variables de tipo matriz (array). NOTA: Esta vulnerabilidad existe debido a una corrección incorrecta para el CVE-2011-4885."
    }
  ],
  "lastModified": "2026-06-16T23:38:20.690",
  "configurations": [
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      "nodes": [
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          "operator": "OR"
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}