{"schema":"threatline.record/2","record":{"id":"CVE-2026-104759","aliases":[],"summary":"WPO365 | SEAMLESS WORDPRESS + MICROSOFT INTEGRATION (WPO365 | LOGIN) <= 44.1 - Unauthenticated Authentication Bypass via OIDC Nonce Replay via id_token Nonce Verification","details":"The WPO365 | SEAMLESS WORDPRESS + MICROSOFT INTEGRATION (WPO365 | LOGIN) plugin for WordPress is vulnerable to Authentication Bypass via OIDC Nonce Replay in all versions up to, and including, 44.1 This is due to `Id_Token_Service_Deprecated::process_openidconnect_token()` using the incompatible WordPress core `wp_verify_nonce()` function to validate a nonce produced by `Nonce_Service::create_nonce()` — a 64-character hex value that `wp_verify_nonce()` can never successfully verify — causing the nonce check to silently fail without terminating authentication, so execution continues into `authenticate_oidc_user()` with the attacker-supplied `id_token`. This makes it possible for unauthenticated attackers who have obtained a previously-issued, valid `id_token` for a target account to replay that token and authenticate as any WordPress user, including administrators, resulting in full site takeover. This vulnerability is only exploitable when the `use_id_token_parser_v2` plugin option is enabled, as this is the configuration that routes token processing through the deprecated parser containing the broken nonce check.","categories":["Applications & CMS"],"product":"WPO365 | SEAMLESS WORDPRESS + MICROSOFT INTEGRATION (WPO365 | LOGIN)","vendor":"wpo365","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-104759","source_modified_at":"2026-10-11T16:55:15.511Z","fetched_at":"2026-10-23T18:48:36.087640Z","product":"WPO365 | SEAMLESS WORDPRESS + MICROSOFT INTEGRATION (WPO365 | LOGIN)","vendor":"wpo365","versions":[{"version":"0","status":"affected","lessThanOrEqual":"44.1","versionType":"semver"}],"defaultStatus":"unaffected"}],"fixed_versions":[],"cvss":8.1,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00515,"percentile":0.43014,"score_date":"2026-10-23"},"published_at":"2026-10-10T07:41:47.371Z","modified_at":"2026-10-11T16:55:15.511Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-104759","fetched_at":"2026-10-23T18:48:36.087640Z","source_modified_at":"2026-10-11T16:55:15.511Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-104759","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/aad7ddac-ed12-4263-8e68-64b1fca8dfad?source=cve"},{"source":"CVE List","url":"https://plugins.trac.wordpress.org/browser/wpo365-login/tags/44.1/Services/Id_Token_Service_Deprecated.php#L110"},{"source":"CVE List","url":"https://plugins.trac.wordpress.org/browser/wpo365-login/tags/44.1/Services/Router_Service.php#L275"},{"source":"CVE List","url":"https://plugins.trac.wordpress.org/browser/wpo365-login/tags/44.1/Services/Id_Token_Service.php#L107"},{"source":"CVE List","url":"https://plugins.trac.wordpress.org/browser/wpo365-login/tags/44.1/Services/Nonce_Service.php#L72"},{"source":"CVE List","url":"https://plugins.trac.wordpress.org/changeset/3727410/wpo365-login"},{"source":"CVE List","url":"https://plugins.trac.wordpress.org/changeset?reponame=&new=3727410%40wpo365-login%2Ftags%2F45.0&old=3682496%40wpo365-login%2Ftags%2F44.1"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"no","technical_impact":"total","assessed_at":"2026-10-11T16:37:26.741155Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-11T16:55:15.511Z","content_hash":"f6891b7cf5fc371a90183a038fc9eddf17e87ceee6d20c19f60b0e9bd670fcc8"}}