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.
Metrics
Affected Vendors & Products
References
History
Mon, 28 Sep 2026 20:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Wordpress-extensions
Wordpress-extensions wp Oauth Server |
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| Vendors & Products |
Wordpress-extensions
Wordpress-extensions wp Oauth Server |
Wed, 23 Sep 2026 11:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | WP OAuth Server < 6.4.0 - Subscriber+ Cross-User Account Takeover via OIDC ID Token Substitution | |
| Weaknesses | CWE-287 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: WPScan
Published: 2026-09-23T06:00:16.102Z
Updated: 2026-09-23T10:58:52.218Z
Reserved: 2026-08-31T08:27:13.691Z
Link: CVE-2026-82843
Updated: 2026-09-23T10:37:50.662Z
Status : Deferred
Published: 2026-09-23T06:17:02.363
Modified: 2026-09-24T14:43:01.483
Link: CVE-2026-82843
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