{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "1.34.4"
              }
            ],
            "source": "CPE_RANGE"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "e34e7f20b51ed7514ba6de8d8a390363ade2237f"
            }
          ],
          "repo": "https://github.com/wikimedia/mediawiki",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "unresolved_ranges": [
      {
        "cpes": [
          "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*"
        ],
        "extracted_events": [
          {
            "introduced": "33"
          },
          {
            "last_affected": "33"
          }
        ],
        "source": "CPE_STRING",
        "vendor_product": "fedoraproject:fedora"
      }
    ]
  },
  "details": "An issue was discovered in the FileImporter extension for MediaWiki before 1.34.4. An attacker can import a file even when the target page is protected against \"page creation\" and the attacker should not be able to create it. This occurs because of a mishandled distinction between an upload restriction and a create restriction. An attacker cannot leverage this to overwrite anything, but can leverage this to force a wiki to have a page with a disallowed title.",
  "id": "CVE-2020-26121",
  "modified": "2026-07-08T05:39:16.877068236Z",
  "published": "2020-09-27T21:15:13.063Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RTTPZ7XMDS66I442OLLHXBDNP2LCBJU6/"
    },
    {
      "type": "ADVISORY",
      "url": "https://commons.wikimedia.org/w/index.php?oldid=454609892#File:Wiki.png"
    },
    {
      "type": "FIX",
      "url": "https://gerrit.wikimedia.org/r/q/Ib852a96afc4dca10516d0510e69c10f9892b351b"
    },
    {
      "type": "FIX",
      "url": "https://phabricator.wikimedia.org/T262628"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ]
}