{"id":"CVE-2025-31691","aliases":["DRUPAL-CONTRIB-2025-020","GHSA-4f8q-mwgc-3mwc"],"url":"https://o3.security/vulnerability/CVE-2025-31691","summary":"OAuth2 Server - Moderately critical - Access bypass - SA-CONTRIB-2025-020","details":"Missing Authorization vulnerability in Drupal OAuth2 Server allows Forceful Browsing.This issue affects OAuth2 Server: from 0.0.0 before 2.1.0.","published":"2025-03-31T21:49:42.796Z","modified":"2026-07-15T01:49:11.688912462Z","cvss":{"score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Packagist","name":"drupal/oauth2_server","fixedVersion":"2.1.0"}],"fix":null,"references":[{"type":"WEB","url":"https://git.drupalcode.org/project/oauth2_server"},{"type":"WEB","url":"https://www.drupal.org/project/oauth2_server"},{"type":"WEB","url":"https://www.drupal.org/sa-contrib-2025-020"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/31xxx/CVE-2025-31691.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-31691"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-15T01:49:11.688912462Z"}}