{
  "id": "CVE-2021-31545",
  "sourceIdentifier": "cve@mitre.org",
  "published": "2021-04-22T03:15:07.937",
  "lastModified": "2021-04-22T19:51:12.277",
  "vulnStatus": "Analyzed",
  "descriptions": [
    {
      "lang": "en",
      "value": "An issue was discovered in the AbuseFilter extension for MediaWiki through 1.35.2. The page_recent_contributors leaked the existence of certain deleted MediaWiki usernames, related to rev_deleted."
    },
    {
      "lang": "es",
      "value": "Se detect\u00f3 un problema en la extensi\u00f3n AbuseFilter para MediaWiki versiones hasta 1.35.2. El page_recent_contributors filtr\u00f3 la existencia de determinados nombres de usuario de MediaWiki eliminados, relacionados con rev_deleted"
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 1.4
      }
    ],
    "cvssMetricV2": [
      {
        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
          "version": "2.0",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N",
          "accessVector": "NETWORK",
          "accessComplexity": "LOW",
          "authentication": "NONE",
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 5.0
        },
        "baseSeverity": "MEDIUM",
        "exploitabilityScore": 10.0,
        "impactScore": 2.9,
        "acInsufInfo": false,
        "obtainAllPrivilege": false,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ]
  },
  "weaknesses": [
    {
      "source": "nvd@nist.gov",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-200"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:*",
              "versionEndIncluding": "1.35.2",
              "matchCriteriaId": "4067807D-769C-485F-A7E3-EE96885BDCE7"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://gerrit.wikimedia.org/r/q/I8d5ed9ca84282ee50832035af86123633fc88293",
      "source": "cve@mitre.org",
      "tags": [
        "Issue Tracking",
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://phabricator.wikimedia.org/T71367",
      "source": "cve@mitre.org",
      "tags": [
        "Third Party Advisory"
      ]
    }
  ]
}