CVE-2026-82843
WP OAuth Server < 6.4.0 - Subscriber+ Cross-User Account Takeover via OIDC ID Token Substitution
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | unknown |
| Product | wp oauth server ( login with wordpress ) |
| Published | Sep 23, 2026 |
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Affected Versions
Unknown / WP OAuth Server ( Login with WordPress )
0 < 6.4.0
References
Credits
vuxvinh WPScan