{"id":"CVE-2026-82843","published":"2026-09-23T06:17:02.363","lastModified":"2026-09-24T14:43:01.483","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.","cvssScore":9,"cvssSeverity":"CRITICAL","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H","cwes":["CWE-287"],"vendors":[],"products":[],"references":[{"url":"https://wpscan.com/vulnerability/45bc7096-5d04-4fe6-a332-31aed507a3a0/","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":{"summary":"This flaw allows users with the Subscriber role and above to obtain a valid identity assertion for another user, including administrators, and authenticate as them, due to the plugin not binding the OpenID Connect identity assertion to the correct authorization grant.","exploitability":"Exploitation is relatively straightforward as it requires a user with the Subscriber role or higher to authenticate and then obtain the assertion of another user. Precondition is the presence of the WP OAuth Server plugin before version 6.4.0.","blast_radius":"If exploited, this flaw could lead to unauthorized access and potential full control over the affected WordPress site, including actions performed by administrators.","remediation":"Upgrade to WP OAuth Server version 6.4.0 or later.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["auth-bypass","web","wordpress"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-09-29T08:56:04.085Z"}}