{"id":"GHSA-6gjf-7w99-j7x7","summary":"Deleted Admin Can Sign In to Admin Interface","details":"### Impact\nAssuming an administrator once had previous access to the admin interface, they may still be able to sign in to the backend using October CMS v2.0.\n\n### Patches\nThe issue has been patched in v2.1.12\n\n### Workarounds\n\n- Reset the password of the deleted accounts to prevent them from signing in.\n\n- Please contact hello@octobercms.com for code change instructions if you are unable to upgrade.\n\n### References\n\nCredits to:\n• Daniel Bidala\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Email us at [hello@octobercms.com](mailto:hello@octobercms.com)\n","aliases":["CVE-2021-41126"],"modified":"2026-07-08T06:27:59.253450986Z","published":"2021-10-06T17:46:40Z","database_specific":{"cwe_ids":["CWE-287"],"severity":"HIGH","github_reviewed":true,"github_reviewed_at":"2021-10-06T17:27:51Z","nvd_published_at":"2021-10-06T18:15:00Z"},"references":[{"type":"WEB","url":"https://github.com/octobercms/october/security/advisories/GHSA-6gjf-7w99-j7x7"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-41126"},{"type":"PACKAGE","url":"https://github.com/octobercms/october"},{"type":"WEB","url":"https://octobercms.com/changelog"}],"affected":[{"package":{"name":"october/october","ecosystem":"Packagist","purl":"pkg:composer/october/october"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.1.0"},{"fixed":"2.1.12"}]}],"versions":["v2.1.0","v2.1.10","v2.1.3","v2.1.5","v2.1.6","v2.1.8"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2021/10/GHSA-6gjf-7w99-j7x7/GHSA-6gjf-7w99-j7x7.json"}},{"package":{"name":"october/system","ecosystem":"Packagist","purl":"pkg:composer/october/system"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.1.0"},{"fixed":"2.1.12"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2021/10/GHSA-6gjf-7w99-j7x7/GHSA-6gjf-7w99-j7x7.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H"}]}