{"id":"GHSA-6gjf-7w99-j7x7","aliases":["CVE-2021-41126"],"title":"Deleted Admin Can Sign In to Admin Interface","titleSource":"OSV","descriptionSource":"OSV","declaredSeverity":"HIGH","description":"### 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","severity":"high","score":7.2,"published":"2021-10-06T17:46:40.000Z","modified":"2026-07-08T06:27:59.253Z","withdrawn":false,"knownExploited":false,"affected":[{"ecosystem":"Packagist","name":"october/october","sources":[{"name":"OSV · GHSA-6gjf-7w99-j7x7","url":"https://osv.dev/vulnerability/GHSA-6gjf-7w99-j7x7"}],"ranges":[{"events":[{"introduced":"2.1.0"},{"fixed":"2.1.12"}],"type":"ECOSYSTEM"}],"versions":["v2.1.0","v2.1.10","v2.1.3","v2.1.5","v2.1.6","v2.1.8"],"fixed":["2.1.12"]},{"ecosystem":"Packagist","name":"october/system","sources":[{"name":"OSV · GHSA-6gjf-7w99-j7x7","url":"https://osv.dev/vulnerability/GHSA-6gjf-7w99-j7x7"}],"ranges":[{"events":[{"introduced":"2.1.0"},{"fixed":"2.1.12"}],"type":"ECOSYSTEM"}],"versions":[],"fixed":["2.1.12"]}],"sourceAffected":[],"references":["https://github.com/octobercms/october/security/advisories/GHSA-6gjf-7w99-j7x7","https://nvd.nist.gov/vuln/detail/CVE-2021-41126","https://github.com/octobercms/october","https://octobercms.com/changelog"],"sources":[{"name":"OSV","id":"GHSA-6gjf-7w99-j7x7","modified":"2026-07-08T06:27:59.253450986Z","url":"https://osv.dev/vulnerability/GHSA-6gjf-7w99-j7x7"}],"assessments":[{"source":"OSV","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","score":7.2}],"products":[],"remediation":[],"kev":{"status":"not-listed","checkedAt":"2026-10-29T00:35:31.531Z"},"coverage":[{"source":"NVD","status":"not-checked"},{"source":"GHSA","status":"not-checked"},{"source":"EUVD","status":"not-checked"},{"source":"EPSS","status":"not-checked"}],"evidence":[]}