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CVE-2026-82843

CRITICAL 9.0 CVSS 3.1
Published
September 23, 2026
Last modified
September 24, 2026
NVD status
Deferred
Reported by
contact@wpscan.com
Weakness
CWE-287
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

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.

Affected WordPress components

  • WP OAuth Server ( Login with WordPress ) Plugin · miniorange-oauth-20-server
    Possible match Active
    Before 6.4.0
    View on WordPress.org

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

  • Unknown WP OAuth Server ( Login with WordPress ) — Before 6.4.0

References

  • wpscan.com https://wpscan.com/vulnerability/45bc7096-5d04-4fe6-a332-31aed507a3a0/
  • nvd.nist.gov Official NVD record