{
  "schema_version": "1.4.0",
  "id": "GHSA-6475-q4qm-387r",
  "modified": "2022-05-24T17:48:08Z",
  "published": "2022-05-24T17:48:08Z",
  "aliases": [
    "CVE-2021-31553"
  ],
  "details": "An issue was discovered in the CheckUser extension for MediaWiki through 1.35.2. MediaWiki usernames with trailing whitespace could be stored in the cu_log database table such that denial of service occurred for certain CheckUser extension pages and functionality. For example, the attacker could turn off Special:CheckUserLog and thus interfere with usage tracking.",
  "severity": [],
  "affected": [],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-31553"
    },
    {
      "type": "WEB",
      "url": "https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/666963"
    },
    {
      "type": "WEB",
      "url": "https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/666964"
    },
    {
      "type": "WEB",
      "url": "https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/667023"
    },
    {
      "type": "WEB",
      "url": "https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/667024"
    },
    {
      "type": "WEB",
      "url": "https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/667025"
    },
    {
      "type": "WEB",
      "url": "https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/667027"
    },
    {
      "type": "WEB",
      "url": "https://phabricator.wikimedia.org/T275669"
    }
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-428"
    ],
    "severity": "MODERATE",
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2021-04-22T03:15:00Z"
  }
}