{"id":"CVE-2021-29487","aliases":["GHSA-h76r-vgf3-j6w5"],"url":"https://o3.security/vulnerability/CVE-2021-29487","summary":"October CMS auth bypass and account takeover","details":"octobercms in a CMS platform based on the Laravel PHP Framework. In affected versions of the october/system package an attacker can exploit this vulnerability to bypass authentication and takeover of and user account on an October CMS server. The vulnerability is exploitable by unauthenticated users via a specially crafted request. This only affects frontend users and the attacker must obtain a Laravel secret key for cookie encryption and signing in order to exploit this vulnerability. The issue has been patched in Build 472 and v1.1.5.","published":"2021-08-26T19:15:07.160Z","modified":"2026-08-07T15:13:55.912869Z","cvss":{"score":7.4,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Packagist","name":"october/system","fixedVersion":"1.0.472"},{"ecosystem":"Packagist","name":"october/system","fixedVersion":"1.1.5"}],"fix":{"url":"https://github.com/octobercms/library/commit/016a297b1bec55d2e53bc889458ed2cb5c3e9374","label":"octobercms/library@016a297"},"references":[{"type":"FIX","url":"https://github.com/octobercms/library/commit/016a297b1bec55d2e53bc889458ed2cb5c3e9374"},{"type":"FIX","url":"https://github.com/octobercms/library/commit/5bd1a28140b825baebe6becd4f7562299d3de3b9"},{"type":"FIX","url":"https://github.com/octobercms/october/security/advisories/GHSA-h76r-vgf3-j6w5"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T15:13:55.912869Z"}}