{"id":"CVE-2021-41126","aliases":["GHSA-6gjf-7w99-j7x7"],"url":"https://o3.security/vulnerability/CVE-2021-41126","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","published":"2021-10-06T18:15:11.013Z","modified":"2026-08-07T19:48:37.812272Z","cvss":{"score":7.2,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H"},"epss":{"score":0.01091,"percentile":0.6377,"asOf":"2026-09-17"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Packagist","name":"october/october","fixedVersion":"2.1.12"},{"ecosystem":"Packagist","name":"october/system","fixedVersion":"2.1.12"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/octobercms/october/security/advisories/GHSA-6gjf-7w99-j7x7"},{"type":"ADVISORY","url":"https://octobercms.com/changelog"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-41126"},{"type":"PACKAGE","url":"https://github.com/octobercms/october"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T19:48:37.812272Z"}}