{"id":"CVE-2020-13671","aliases":["ALPINE-CVE-2020-13671","BIT-drupal-2020-13671","DLA-2458-1","DRUPAL-CORE-2020-012","EUVD-2021-2168","GHSA-68jc-v27h-vhmw","UBUNTU-CVE-2020-13671","USN-6981-1","USN-6981-2"],"status":"published","title":"Drupal core Unrestricted Upload of File with Dangerous Type","description":"Drupal core does not properly sanitize certain filenames on uploaded files, which can lead to files being interpreted as the incorrect extension and served as the wrong MIME type or executed as PHP for certain hosting configurations. This issue affects: Drupal Drupal Core 9.0 versions prior to 9.0.8, 8.9 versions prior to 8.9.9, 8.8 versions prior to 8.8.11, and 7 versions prior to 7.74.","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.36167,"percentile":0.98487,"model":"v2026.06.15"},"facts":{"in_kev":true,"known_exploited":true,"public_exploit":true,"fix_available":true},"cwes":["CWE-434"],"published":"2020-11-18T17:18:31Z","modified":"2026-11-03T06:32:23Z","kev":{"date_added":"2022-01-18","due_date":"2022-07-18","required_action":"Apply updates per vendor instructions.","known_ransomware_use":"Unknown"},"exploitation":[{"source":"euvd","since":"2022-01-18"},{"source":"kev","since":"2022-01-18"}],"exploits":[{"source":"pocgithub","id":"Dungsocool/CVE-2020-13671","title":"Dungsocool/CVE-2020-13671","date":"2026-08-22","url":"https://github.com/Dungsocool/CVE-2020-13671"},{"source":"pocgithub","id":"Dungsocool/CVE-2020-13671-old","title":"Dungsocool/CVE-2020-13671-old","date":"2026-08-22","url":"https://github.com/Dungsocool/CVE-2020-13671-old"},{"source":"pocgithub","id":"ivanesk315/CVE-2020-13671","title":"ivanesk315/CVE-2020-13671","date":"2026-09-10","url":"https://github.com/ivanesk315/CVE-2020-13671"}],"fixes":[{"ecosystem":"Packagist","package":"drupal/core","fixed_in":["9.0.8","8.9.9","8.8.11","7.74"],"sources":["ghsa","osv"]},{"ecosystem":"Packagist","package":"drupal/drupal","fixed_in":["7.74","8.8.11","8.9.9","9.0.8"],"sources":["ghsa","osv"]},{"ecosystem":"Alpine:v3.11","package":"drupal7","fixed_in":["7.74-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.12","package":"drupal7","fixed_in":["7.74-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.13","package":"drupal7","fixed_in":["7.74-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.14","package":"drupal7","fixed_in":["7.74-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.15","package":"drupal7","fixed_in":["7.74-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.16","package":"drupal7","fixed_in":["7.74-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.17","package":"drupal7","fixed_in":["7.74-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.18","package":"drupal7","fixed_in":["7.74-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.19","package":"drupal7","fixed_in":["7.74-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.20","package":"drupal7","fixed_in":["7.74-r0"],"sources":["osv"]},{"ecosystem":"Bitnami","package":"drupal","fixed_in":["7.74.0","8.8.11","8.9.9","9.0.8"],"sources":["osv"]},{"ecosystem":"Ubuntu:Pro:14.04:LTS","package":"drupal7","fixed_in":["7.26-1ubuntu0.1+esm2"],"sources":["osv"]},{"ecosystem":"Ubuntu:Pro:16.04:LTS","package":"drupal7","fixed_in":["7.44-1ubuntu1~16.04.0+esm2"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"Packagist","package":"drupal/core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"9.0.0"},{"fixed":"9.0.8"}]}]},{"source":"ghsa","ecosystem":"Packagist","package":"drupal/core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"8.9.0"},{"fixed":"8.9.9"}]}]},{"source":"ghsa","ecosystem":"Packagist","package":"drupal/core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"8.0.0"},{"fixed":"8.8.11"}]}]},{"source":"ghsa","ecosystem":"Packagist","package":"drupal/core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"7.0.0"},{"fixed":"7.74"}]}]},{"source":"ghsa","ecosystem":"Packagist","package":"drupal/drupal","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"7.0.0"},{"fixed":"7.74"}]}]},{"source":"ghsa","ecosystem":"Packagist","package":"drupal/drupal","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"8.0.0"},{"fixed":"8.8.11"}]}]},{"source":"ghsa","ecosystem":"Packagist","package":"drupal/drupal","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"8.9.0"},{"fixed":"8.9.9"}]}]},{"source":"ghsa","ecosystem":"Packagist","package":"drupal/drupal","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"9.0.0"},{"fixed":"9.0.8"}]}]},{"source":"osv","ecosystem":"Alpine:v3.11","package":"drupal7","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.74-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.12","package":"drupal7","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.74-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.13","package":"drupal7","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.74-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.14","package":"drupal7","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.74-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.15","package":"drupal7","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.74-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.16","package":"drupal7","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.74-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.17","package":"drupal7","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.74-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.18","package":"drupal7","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.74-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.19","package":"drupal7","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.74-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.20","package":"drupal7","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.74-r0"}]}]},{"source":"osv","ecosystem":"Bitnami","package":"drupal","ranges":[{"type":"SEMVER","events":[{"introduced":"7.0.0"},{"fixed":"7.74.0"},{"introduced":"8.8.0"},{"fixed":"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core does not properly sanitize certain filenames on uploaded files, which can lead to files being interpreted as the incorrect extension and served as the wrong MIME type or executed as PHP for certain hosting configurations. This issue affects: Drupal Drupal Core 9.0 versions prior to 9.0.8, 8.9 versions prior to 8.9.9, 8.8 versions prior to 8.8.11, and 7 versions prior to 7.74.","status":"published","published":"2020-11-20T15:40:39Z","modified":"2025-10-21T23:35:32.528Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"adp"}],"cwes":["CWE-434"],"updated_at":"2026-11-02T14:35:54.170199Z"}],"euvd":[{"id":"EUVD-2021-2168","description":"Drupal core does not properly sanitize certain filenames on uploaded files, which can lead to files being interpreted as the incorrect extension and served as the wrong MIME type or executed as PHP for certain hosting configurations. This issue affects: Drupal Drupal Core 9.0 versions prior to 9.0.8, 8.9 versions prior to 8.9.9, 8.8 versions prior to 8.8.11, and 7 versions prior to 7.74.","status":"published","published":"2020-11-20T15:40:39Z","modified":"2025-10-21T23:35:32Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"exploited_since":"2022-01-18","updated_at":"2026-11-02T20:31:25.308373Z"}],"ghsa":[{"id":"GHSA-68jc-v27h-vhmw","title":"Drupal core Unrestricted Upload of File with Dangerous Type","description":"Drupal core does not properly sanitize certain filenames on uploaded files, which can lead to files being interpreted as the incorrect extension and served as the wrong MIME type or executed as PHP for certain hosting configurations. This issue affects: Drupal Drupal Core 9.0 versions prior to 9.0.8, 8.9 versions prior to 8.9.9, 8.8 versions prior to 8.8.11, and 7 versions prior to 7.74.","status":"published","published":"2021-10-12T16:28:25Z","modified":"2025-10-22T17:59:38Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:H","level":"high"}],"cwes":["CWE-434"],"updated_at":"2026-11-02T14:39:02.474737Z"}],"kev":[{"id":"CVE-2020-13671","title":"Drupal core Un-restricted Upload of File","description":"Improper sanitization in the extension file names is present in Drupal core.","cwes":["CWE-434"],"kev":{"date_added":"2022-01-18","due_date":"2022-07-18","required_action":"Apply updates per vendor instructions.","known_ransomware_use":"Unknown"},"updated_at":"2026-11-02T17:00:16.541131Z"}],"nvd":[{"id":"CVE-2020-13671","description":"Drupal core does not properly sanitize certain filenames on uploaded files, which can lead to files being interpreted as the incorrect extension and served as the wrong MIME type or executed as PHP for certain hosting configurations. This issue affects: Drupal Drupal Core 9.0 versions prior to 9.0.8, 8.9 versions prior to 8.9.9, 8.8 versions prior to 8.8.11, and 7 versions prior to 7.74.","status":"published","published":"2020-11-20T16:15:15.433Z","modified":"2026-06-17T02:53:32.867Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"2.0","score":6.5,"vector":"AV:N/AC:L/Au:S/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-434"],"updated_at":"2026-11-02T14:06:25.394006Z"}],"osv":[{"id":"ALPINE-CVE-2020-13671","description":"Drupal core does not properly sanitize certain filenames on uploaded files, which can lead to files being interpreted as the incorrect extension and served as the wrong MIME type or executed as PHP for certain hosting configurations. This issue affects: Drupal Drupal Core 9.0 versions prior to 9.0.8, 8.9 versions prior to 8.9.9, 8.8 versions prior to 8.8.11, and 7 versions prior to 7.74.","status":"published","published":"2020-11-20T16:15:15.433Z","modified":"2026-11-03T06:32:23.826739601Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-03T07:17:57.723967Z"},{"id":"CVE-2020-13671","description":"Drupal core does not properly sanitize certain filenames on uploaded files, which can lead to files being interpreted as the incorrect extension and served as the wrong MIME type or executed as PHP for certain hosting configurations. This issue affects: Drupal Drupal Core 9.0 versions prior to 9.0.8, 8.9 versions prior to 8.9.9, 8.8 versions prior to 8.8.11, and 7 versions prior to 7.74.","status":"published","published":"2020-11-20T16:15:15.433Z","modified":"2026-10-24T10:30:20.854490397Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:14.418339Z"},{"id":"GHSA-68jc-v27h-vhmw","title":"Drupal core Unrestricted Upload of File with Dangerous Type","description":"Drupal core does not properly sanitize certain filenames on uploaded files, which can lead to files being interpreted as the incorrect extension and served as the wrong MIME type or executed as PHP for certain hosting configurations. This issue affects: Drupal Drupal Core 9.0 versions prior to 9.0.8, 8.9 versions prior to 8.9.9, 8.8 versions prior to 8.8.11, and 7 versions prior to 7.74.","status":"published","published":"2021-10-12T16:28:25Z","modified":"2025-12-10T23:41:21.622533Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:H","level":"high"}],"cwes":["CWE-434"],"updated_at":"2026-11-02T15:46:39.266402Z"},{"id":"UBUNTU-CVE-2020-13671","description":"Drupal core does not properly sanitize certain filenames on uploaded files, which can lead to files being interpreted as the incorrect extension and served as the wrong MIME type or executed as PHP for certain hosting configurations. This issue affects: Drupal Drupal Core 9.0 versions prior to 9.0.8, 8.9 versions prior to 8.9.9, 8.8 versions prior to 8.8.11, and 7 versions prior to 7.74.","status":"published","published":"2020-11-20T16:15:00Z","modified":"2026-02-04T02:18:41.360464Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"},{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:54:22.804634Z"},{"id":"BIT-drupal-2020-13671","description":"Drupal core does not properly sanitize certain filenames on uploaded files, which can lead to files being interpreted as the incorrect extension and served as the wrong MIME type or executed as PHP for certain hosting configurations. This issue affects: Drupal Drupal Core 9.0 versions prior to 9.0.8, 8.9 versions prior to 8.9.9, 8.8 versions prior to 8.8.11, and 7 versions prior to 7.74.","status":"published","published":"2024-03-06T10:57:20.872Z","modified":"2026-09-08T08:47:04.365184669Z","updated_at":"2026-11-02T15:28:29.563843Z"},{"id":"DLA-2458-1","title":"drupal7 - security update","status":"published","published":"2020-11-19T00:00:00Z","modified":"2026-03-09T01:19:16.820212Z","updated_at":"2026-11-02T15:46:10.712745Z"},{"id":"DRUPAL-CORE-2020-012","description":"*Update November 18: Documented longer list of dangerous file extensions*\n\nDrupal core does not properly sanitize certain filenames on uploaded files, which can lead to files being interpreted as the incorrect extension and served as the wrong MIME type or executed as PHP for certain hosting configurations.","status":"published","published":"2020-11-18T17:18:31Z","modified":"2026-09-19T17:38:35Z","updated_at":"2026-11-02T15:46:13.900249Z"},{"id":"USN-6981-1","title":"drupal7 vulnerabilities","description":"It was discovered that Drupal incorrectly sanitized uploaded filenames. A\nremote attacker could possibly use this issue to execute arbitrary code.\n(CVE-2020-13671)\n\nIt was discovered that Drupal incorrectly sanitized archived filenames. A\nremote attacker could possibly use this issue to overwrite arbitrary files,\nor execute arbitrary code. (CVE-2020-28948, CVE-2020-28949)\n","status":"published","published":"2024-08-27T16:57:24Z","modified":"2026-06-25T13:32:28.791289361Z","updated_at":"2026-11-02T16:58:18.876384Z"},{"id":"USN-6981-2","title":"drupal7 vulnerabilities","description":"USN-6981-1 fixed vulnerabilities in Drupal. This update provides the\ncorresponding updates for Ubuntu 14.04 LTS.\n\nOriginal advisory details:\n\n It was discovered that Drupal incorrectly sanitized uploaded filenames. A\n remote attacker could possibly use this issue to execute arbitrary code.\n (CVE-2020-13671)\n \n It was discovered that Drupal incorrectly sanitized archived filenames. A\n remote attacker could possibly use this issue to overwrite arbitrary\n files, or execute arbitrary code. (CVE-2020-28948, CVE-2020-28949)\n","status":"published","published":"2024-09-03T15:12:58Z","modified":"2026-06-29T13:46:59.149373777Z","updated_at":"2026-11-02T16:58:18.876384Z"}]}}