{"id":"CVE-2020-27621","aliases":["BIT-mediawiki-2020-27621","EUVD-2020-20128","GHSA-hh63-773r-23jr"],"status":"published","title":"The FileImporter extension in MediaWiki through 1.35.0 was not properly attributing various user...","description":"The FileImporter extension in MediaWiki through 1.35.0 was not properly attributing various user actions to a specific user's IP address. Instead, for various actions, it would report the IP address of an internal Wikimedia Foundation server by omitting X-Forwarded-For data. This resulted in an inability to properly audit and attribute various user actions performed via the FileImporter extension.","severity":{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.00709,"percentile":0.53816,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"published":"2020-10-22T03:04:57Z","modified":"2026-10-24T10:31:06Z","fixes":[{"ecosystem":"Bitnami","package":"mediawiki","fixed_in":["1.35.1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Bitnami","package":"mediawiki","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.35.1"}]}]}],"products":[{"vendor":"mediawiki","product":"mediawiki"}],"references":[{"url":"https://phabricator.wikimedia.org/T265810","tags":["x_refsource_MISC","x_transferred","Exploit","Patch","Vendor Advisory","web","fix"]},{"url":"https://gerrit.wikimedia.org/r/q/I24a240253c7a5c66dd493a68e8c23d95a17e1b21","tags":["x_refsource_MISC","x_transferred","Exploit","Patch","Vendor Advisory","web","fix"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-27621","tags":["web"]},{"url":"https://github.com/advisories/GHSA-hh63-773r-23jr"}],"sources":{"cve":[{"id":"CVE-2020-27621","description":"The FileImporter extension in MediaWiki through 1.35.0 was not properly attributing various user actions to a specific user's IP address. Instead, for various actions, it would report the IP address of an internal Wikimedia Foundation server by omitting X-Forwarded-For data. This resulted in an inability to properly audit and attribute various user actions performed via the FileImporter extension.","status":"published","published":"2020-10-22T03:04:57Z","modified":"2024-08-04T16:18:44.821Z","updated_at":"2026-11-02T14:35:53.236501Z"}],"euvd":[{"id":"EUVD-2020-20128","description":"The FileImporter extension in MediaWiki through 1.35.0 was not properly attributing various user actions to a specific user's IP address. Instead, for various actions, it would report the IP address of an internal Wikimedia Foundation server by omitting X-Forwarded-For data. This resulted in an inability to properly audit and attribute various user actions performed via the FileImporter extension.","status":"published","published":"2020-10-22T03:04:57Z","modified":"2024-08-04T16:18:44Z","updated_at":"2026-11-03T03:07:12.435876Z"}],"ghsa":[{"id":"GHSA-hh63-773r-23jr","title":"The FileImporter extension in MediaWiki through 1.35.0 was not properly attributing various user...","description":"The FileImporter extension in MediaWiki through 1.35.0 was not properly attributing various user actions to a specific user's IP address. Instead, for various actions, it would report the IP address of an internal Wikimedia Foundation server by omitting X-Forwarded-For data. This resulted in an inability to properly audit and attribute various user actions performed via the FileImporter extension.","status":"published","published":"2022-05-24T17:32:00Z","modified":"2023-01-29T05:04:32Z","updated_at":"2026-11-02T14:45:34.663559Z"}],"nvd":[{"id":"CVE-2020-27621","description":"The FileImporter extension in MediaWiki through 1.35.0 was not properly attributing various user actions to a specific user's IP address. Instead, for various actions, it would report the IP address of an internal Wikimedia Foundation server by omitting X-Forwarded-For data. This resulted in an inability to properly audit and attribute various user actions performed via the FileImporter extension.","status":"published","published":"2020-10-22T04:15:12.187Z","modified":"2026-06-17T03:09:22.68Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":4,"vector":"AV:N/AC:L/Au:S/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:06:20.704992Z"}],"osv":[{"id":"CVE-2020-27621","description":"The FileImporter extension in MediaWiki through 1.35.0 was not properly attributing various user actions to a specific user's IP address. Instead, for various actions, it would report the IP address of an internal Wikimedia Foundation server by omitting X-Forwarded-For data. This resulted in an inability to properly audit and attribute various user actions performed via the FileImporter extension.","status":"published","published":"2020-10-22T04:15:12.187Z","modified":"2026-10-24T10:31:06.604437196Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:16.248747Z"},{"id":"BIT-mediawiki-2020-27621","description":"The FileImporter extension in MediaWiki through 1.35.0 was not properly attributing various user actions to a specific user's IP address. Instead, for various actions, it would report the IP address of an internal Wikimedia Foundation server by omitting X-Forwarded-For data. This resulted in an inability to properly audit and attribute various user actions performed via the FileImporter extension.","status":"published","published":"2024-03-06T11:13:47.809Z","modified":"2025-04-03T14:40:37.652Z","updated_at":"2026-11-02T15:28:33.072289Z"}]}}