{"id":"GHSA-hj78-p4h7-m5fv","aliases":["CVE-2025-24856"],"title":"TYPO3-EXT-SA-2025-001: Account Takeover in extension \"OpenID Connect Authentication\" (oidc)","titleSource":"OSV","descriptionSource":"OSV","declaredSeverity":"MODERATE","description":"## Problem Description\nA vulnerability in the account linking logic of the extension allows a pre-hijacking attack leading to Account Takeover. The attack can only be exploited if the following requirements are met:\n\n- An attacker can anticipate the email address of the user.\n- An attacker can register a public frontend user account using that email address before the user's first OIDC login.\n- The IDP returns the field email containing the email address of the user\n\n## Solution\nAn updated versions 4.0.0 is available from the TYPO3 extension manager, packagist and at \nhttps://extensions.typo3.org/extension/download/oidc/4.0.0/zip\n\nUsers of the extension are advised to update the extension as soon as possible.","severity":"medium","score":4.2,"published":"2025-01-28T19:15:44.000Z","modified":"2025-03-17T20:45:32.222Z","withdrawn":false,"knownExploited":false,"affected":[{"ecosystem":"Packagist","name":"causal/oidc","sources":[{"name":"OSV · GHSA-hj78-p4h7-m5fv","url":"https://osv.dev/vulnerability/GHSA-hj78-p4h7-m5fv"}],"ranges":[{"events":[{"introduced":"3.0.0"},{"fixed":"4.0.0"}],"type":"ECOSYSTEM"}],"versions":["v3.0.0"],"fixed":["4.0.0"]}],"sourceAffected":[],"references":["https://nvd.nist.gov/vuln/detail/CVE-2025-24856","https://github.com/xperseguers/t3ext-oidc/commit/877e09f6faf4c87bbb41233112ec7e30d3c902b3","https://github.com/FriendsOfPHP/security-advisories/blob/master/causal/oidc/CVE-2025-24856.yaml","https://typo3.org/security/advisory/typo3-ext-sa-2025-001"],"sources":[{"name":"OSV","id":"GHSA-hj78-p4h7-m5fv","modified":"2025-03-17T20:45:32.222405Z","url":"https://osv.dev/vulnerability/GHSA-hj78-p4h7-m5fv"}],"assessments":[{"source":"OSV","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N","score":4.2}],"products":[],"remediation":[],"kev":{"status":"not-listed","checkedAt":"2026-10-28T13:35:32.756Z"},"coverage":[{"source":"NVD","status":"not-checked"},{"source":"GHSA","status":"not-checked"},{"source":"EUVD","status":"not-checked"},{"source":"EPSS","status":"not-checked"}],"evidence":[]}