{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:mediawiki:abusefilter:*:*:*:*:*:mediawiki:*:*",
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "1.34"
              }
            ],
            "source": "CPE_RANGE"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "3c2035dd9e2a0dc1398403fe092bcc3a90f5fec6"
            }
          ],
          "repo": "https://github.com/wikimedia/mediawiki-extensions-abusefilter",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {},
  "details": "An issue was discovered in the AbuseFilter extension through 1.34 for MediaWiki. Once a specific abuse filter has (accidentally or otherwise) been made public, its previous versions can be exposed, thus potentially disclosing private or sensitive information within the filter's definition.",
  "id": "CVE-2019-18987",
  "modified": "2026-07-08T05:38:48.091963147Z",
  "published": "2019-11-15T06:15:10.333Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.mediawiki.org/wiki/Extension:AbuseFilter"
    },
    {
      "type": "FIX",
      "url": "https://gerrit.wikimedia.org/r/q/Ic12790bd33982473f77551bde9599ed083a3e1f1"
    },
    {
      "type": "FIX",
      "url": "https://phabricator.wikimedia.org/T237887"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}