CVE-2005-2830

Status: ModifiedMedium (5)—
Microsoft Internet Explorer 5.01, 5.5, and 6, when using an HTTPS proxy server that requires Basic Authentication, sends URLs in cleartext, which allows remote attackers to obtain sensitive information, aka "HTTPS Proxy Vulnerability."
CVSS

Version: 2.0
Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N
Base score: 5
Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 35%
Percentile among all scored CVEs: 98
Score date: 10/9/2026
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)

Microsoft — IE Microsoft — Internet Explorer
CWEs

NVD-CWE-Other
References

Raw JSON (NVD)

Show
{
  "id": "CVE-2005-2830",
  "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
      }
    ]
  },
  "affected": [
    {
      "source": "secure@microsoft.com",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2005-12-14T11:03:00.000",
  "references": [
    {
      "url": "http://secunia.com/advisories/15368",
      "source": "secure@microsoft.com"
    },
    {
      "url": "http://secunia.com/advisories/18064",
      "source": "secure@microsoft.com"
    },
    {
      "url": "http://secunia.com/advisories/18311",
      "source": "secure@microsoft.com"
    },
    {
      "url": "http://securitytracker.com/id?1015350",
      "source": "secure@microsoft.com"
    },
    {
      "url": "http://support.avaya.com/elmodocs2/security/ASA-2005-234.pdf",
      "source": "secure@microsoft.com"
    },
    {
      "url": "http://www.securityfocus.com/bid/15825",
      "tags": [
        "Patch"
      ],
      "source": "secure@microsoft.com"
    },
    {
      "url": "http://www.vupen.com/english/advisories/2005/2867",
      "source": "secure@microsoft.com"
    },
    {
      "url": "http://www.vupen.com/english/advisories/2005/2909",
      "source": "secure@microsoft.com"
    },
    {
      "url": "http://www130.nortelnetworks.com/cgi-bin/eserv/cs/main.jsp?cscat=BLTNDETAIL&DocumentOID=375420",
      "source": "secure@microsoft.com"
    },
    {
      "url": "https://docs.microsoft.com/en-us/security-updates/securitybulletins/2005/ms05-054",
      "source": "secure@microsoft.com"
    },
    {
      "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/23451",
      "source": "secure@microsoft.com"
    },
    {
      "url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1097",
      "source": "secure@microsoft.com"
    },
    {
      "url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1101",
      "source": "secure@microsoft.com"
    },
    {
      "url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1143",
      "source": "secure@microsoft.com"
    },
    {
      "url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1317",
      "source": "secure@microsoft.com"
    },
    {
      "url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1435",
      "source": "secure@microsoft.com"
    },
    {
      "url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1521",
      "source": "secure@microsoft.com"
    },
    {
      "url": "http://secunia.com/advisories/15368",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://secunia.com/advisories/18064",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://secunia.com/advisories/18311",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://securitytracker.com/id?1015350",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://support.avaya.com/elmodocs2/security/ASA-2005-234.pdf",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.securityfocus.com/bid/15825",
      "tags": [
        "Patch"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.vupen.com/english/advisories/2005/2867",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.vupen.com/english/advisories/2005/2909",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www130.nortelnetworks.com/cgi-bin/eserv/cs/main.jsp?cscat=BLTNDETAIL&DocumentOID=375420",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://docs.microsoft.com/en-us/security-updates/securitybulletins/2005/ms05-054",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/23451",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1097",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1101",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1143",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1317",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1435",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1521",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-Other"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Microsoft Internet Explorer 5.01, 5.5, and 6, when using an HTTPS proxy server that requires Basic Authentication, sends URLs in cleartext, which allows remote attackers to obtain sensitive information, aka \"HTTPS Proxy Vulnerability.\""
    },
    {
      "lang": "es",
      "value": "Microsoft Interntet Explorer 5.01, 5.5 y 6, cuando usan un servidor proxy HTTPS que requiere autenticación básica, envía la URL en texto claro, lo que permite a atacantes remotos obtener información sensible, tcc \"Vulnerabilidad proxy HTTPS\""
    }
  ],
  "lastModified": "2026-06-16T22:15:45.080",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:microsoft:ie:6.0:sp1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "24DF2AB3-DEAB-4D70-986E-FFBB7E64B96A"
            },
            {
              "criteria": "cpe:2.3:a:microsoft:internet_explorer:5.0.1:sp4:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "2EB39B99-91A0-4B70-B12A-BA37F6AFBA83"
            },
            {
              "criteria": "cpe:2.3:a:microsoft:internet_explorer:5.5:sp2:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "D05ED9D0-CF78-4FAD-9371-6FB3D5825148"
            },
            {
              "criteria": "cpe:2.3:a:microsoft:internet_explorer:6.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "A19F6133-25D1-44A5-B6B9-354703436783"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "secure@microsoft.com"
}