CVE-2011-4103

Status: ModifiedHigh (7.5)—

emitters.py in Django Piston before 0.2.3 and 0.2.x before 0.2.2.1 does not properly deserialize YAML data, which allows remote attackers to execute arbitrary Python code via vectors related to the yaml.load method.

CVSS

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

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 2.43%
Percentile among all scored CVEs: 84
Score date: 10/3/2026

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 (1)

Djangoproject — Piston

CWEs

CWE-20

References

Raw JSON (NVD)

Show

{
  "id": "CVE-2011-4103",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "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": [
    {
      "source": "secalert@redhat.com",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2014-10-27T01:55:23.280",
  "references": [
    {
      "url": "http://www.debian.org/security/2011/dsa-2344",
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2011/11/01/10",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://bitbucket.org/jespern/django-piston/commits/91bdaec89543/",
      "tags": [
        "Patch"
      ],
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=750658",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://www.djangoproject.com/weblog/2011/nov/01/piston-and-tastypie-security-releases/",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://www.debian.org/security/2011/dsa-2344",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2011/11/01/10",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://bitbucket.org/jespern/django-piston/commits/91bdaec89543/",
      "tags": [
        "Patch"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=750658",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.djangoproject.com/weblog/2011/nov/01/piston-and-tastypie-security-releases/",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "emitters.py in Django Piston before 0.2.3 and 0.2.x before 0.2.2.1 does not properly deserialize YAML data, which allows remote attackers to execute arbitrary Python code via vectors related to the yaml.load method."
    },
    {
      "lang": "es",
      "value": "emitters.py en Django Piston anterior a 0.2.3 y 0.2.x anterior a 0.2.2.1 no deserializa debidamente los datos YAML, lo que permite a atacantes remotos ejecutar código Python arbitrario a través de vectores relacionados con el método yaml.load."
    }
  ],
  "lastModified": "2026-06-16T23:34:25.800",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:djangoproject:piston:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "C10E7821-14C4-4A1E-98FD-2C7991937C98",
              "versionEndIncluding": "0.2.2.0"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "secalert@redhat.com"
}