{"id":"CVE-2026-82843","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-82843","generatedAt":"2026-10-28T02:20:44.437Z","title":"The WP OAuth Server ( Login with WordPress ) WordPress plugin before 6.4.0 does not bind the OpenID Connect identity assertion it issues to the authorization grant being exchanged, returning instead the assertion belonging to whichever user…","description":"The WP OAuth Server ( Login with WordPress ) WordPress plugin before 6.4.0 does not bind the OpenID Connect identity assertion it issues to the authorization grant being exchanged, returning instead the assertion belonging to whichever user authenticated most recently, which allows users with the Subscriber role and above to obtain a validly signed identity assertion for another user, including an administrator, and authenticate as them at any application that uses the site for single sign-on.","published":"2026-09-23T06:17:02.000Z","lastModified":"2026-09-24T14:43:01.000Z","status":"Deferred","sourceIdentifier":"contact@wpscan.com","cvss":{"version":"3.1","score":9,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H"},"cwe":["CWE-287"],"affected":[],"epss":{"score":0.00188,"percentile":0.08357,"date":"2026-10-26","history":[{"date":"2026-09-23","score":0.0018,"percentile":0.07859}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.19%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"scored","label":"Newly scored","at":"2026-09-23T12:15:05.000Z","detail":{"from":null,"score":"9.0","severity":"CRITICAL","fromSeverity":null},"summary":"Now scored CVSS 9.0 CRITICAL."},{"kind":"new","label":"New CVE","at":"2026-09-23T06:17:02.000Z","detail":{"score":null,"severity":null,"publishedAt":"2026-09-23T06:17:02.363Z"},"summary":"New CVE, critical severity (CVSS 9.0)."}],"references":[{"url":"https://wpscan.com/vulnerability/45bc7096-5d04-4fe6-a332-31aed507a3a0/","source":"contact@wpscan.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-82843","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}