CVE-2013-6167

Status: ModifiedMedium (6.8)—💥 Exploit

Mozilla Firefox through 27 sends HTTP Cookie headers without first validating that they have the required character-set restrictions, which allows remote attackers to conduct the equivalent of a persistent Logout CSRF attack via a crafted parameter that forces a web application to set a malformed cookie within an HTTP response.

CVSS

Version: 2.0
Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P
Base score: 6.8

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 1.57%
Percentile among all scored CVEs: 75
Score date: 10/12/2026

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 · Mozilla Firefox - Cookie Verification Denial of Service (4/4/2013)

Affected technologies (1)

Mozilla — Firefox

CWEs

CWE-352

References

Raw JSON (NVD)

Show

{
  "id": "CVE-2013-6167",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 6.8,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": true
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
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          "versions": [
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              "status": "affected",
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  ],
  "published": "2014-02-15T14:57:08.080",
  "references": [
    {
      "url": "http://redmine.lighttpd.net/issues/2188",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://seclists.org/oss-sec/2013/q4/117",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://seclists.org/oss-sec/2013/q4/121",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2013/04/03/10",
      "source": "cve@mitre.org"
    },
    {
      "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=858215",
      "tags": [
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      "source": "cve@mitre.org"
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      "url": "http://seclists.org/oss-sec/2013/q4/117",
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    {
      "url": "http://www.openwall.com/lists/oss-security/2013/04/03/10",
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      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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  ],
  "vulnStatus": "Modified",
  "weaknesses": [
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      "source": "nvd@nist.gov",
      "description": [
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          "lang": "en",
          "value": "CWE-352"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Mozilla Firefox through 27 sends HTTP Cookie headers without first validating that they have the required character-set restrictions, which allows remote attackers to conduct the equivalent of a persistent Logout CSRF attack via a crafted parameter that forces a web application to set a malformed cookie within an HTTP response."
    },
    {
      "lang": "es",
      "value": "Mozilla Firefox hasta 27 envía cabeceras HTTP Cookie sin antes validar que tiene las restricciones character-set necesarias, lo que permite a atacantes remotos realizar el equivalente a un ataque de Logout CSRF persistente a través de un parámetro manipulado que obliga una aplicación web a configurar una cookie malformado dentro de una respuesta HTTP."
    }
  ],
  "lastModified": "2026-06-17T00:00:01.400",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "5F900D93-F93B-4483-AE4C-95A58BE38840",
              "versionEndIncluding": "27.0"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "cve@mitre.org"
}