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CVE-2017-8814

Status: ModifiedHigh (7.5)—

The language converter in MediaWiki before 1.27.4, 1.28.x before 1.28.3, and 1.29.x before 1.29.2 allows attackers to replace text inside tags via a rule definition followed by "a lot of junk."

CVSS

Exploitation probability (EPSS)

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 LinuxMediawiki — Mediawiki

CWEs

References

Raw JSON (NVD)

Show
{
  "id": "CVE-2017-8814",
  "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:N/I:P/A:N",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV30": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.0",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "security@debian.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "MediaWiki before 1.27.4, 1.28.x before 1.28.3, and 1.29.x before 1.29.2",
          "versions": [
            {
              "status": "affected",
              "version": "MediaWiki before 1.27.4, 1.28.x before 1.28.3, and 1.29.x before 1.29.2"
            }
          ]
        }
      ]
    }
  ],
  "published": "2017-11-15T08:29:00.780",
  "references": [
    {
      "url": "http://www.securitytracker.com/id/1039812",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "security@debian.org"
    },
    {
      "url": "https://lists.wikimedia.org/pipermail/mediawiki-announce/2017-November/000216.html",
      "tags": [
        "Mailing List",
        "Patch",
        "Vendor Advisory"
      ],
      "source": "security@debian.org"
    },
    {
      "url": "https://www.debian.org/security/2017/dsa-4036",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "security@debian.org"
    },
    {
      "url": "http://www.securitytracker.com/id/1039812",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://lists.wikimedia.org/pipermail/mediawiki-announce/2017-November/000216.html",
      "tags": [
        "Mailing List",
        "Patch",
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.debian.org/security/2017/dsa-4036",
      "tags": [
        "Third Party 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": "The language converter in MediaWiki before 1.27.4, 1.28.x before 1.28.3, and 1.29.x before 1.29.2 allows attackers to replace text inside tags via a rule definition followed by \"a lot of junk.\""
    },
    {
      "lang": "es",
      "value": "El convertidor de lenguaje en MediaWiki en versiones anteriores a la 1.27.4; las versiones 1.28.x anteriores a la 1.28.3 y las versiones 1.29.x anteriores a la 1.29.2 permite que atacantes reemplacen texto dentro de etiquetas mediante una definición de reglas seguida por mucho contenido innecesario."
    }
  ],
  "lastModified": "2026-06-17T01:27:00.497",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "2825F885-DD77-4822-B659-D5AFB56C6B17",
              "versionEndIncluding": "1.27.3"
            },
            {
              "criteria": "cpe:2.3:a:mediawiki:mediawiki:1.28.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "70CAB8A9-39D5-41F4-800C-79E4FE57B12D"
            },
            {
              "criteria": "cpe:2.3:a:mediawiki:mediawiki:1.28.1:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "A060BA59-05C8-4646-97D7-4F382B4EBCC6"
            },
            {
              "criteria": "cpe:2.3:a:mediawiki:mediawiki:1.28.2:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "E67B837B-D085-4EE4-9556-D25BFA9BC108"
            },
            {
              "criteria": "cpe:2.3:a:mediawiki:mediawiki:1.29.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "CFA5659C-9DEA-494E-BB32-E6573E180C26"
            },
            {
              "criteria": "cpe:2.3:a:mediawiki:mediawiki:1.29.1:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "9A457BE6-9F2F-45C9-A650-46F7E4B77E20"
            }
          ],
          "operator": "OR"
        }
      ]
    },
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "DEECE5FC-CACF-4496-A3E7-164736409252"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "security@debian.org"
}