EUVD Vulnerability Catalog

EUVD-2026-85030

Severity: CRITICAL Base Score: 9 CVSS Version: 3.1

Vulnerability 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.

CVSS Vector Analysis

Below is the complete, human-readable breakdown of the CVSS metric string: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

▪ Attack Vector (AV): Network

▪ Attack Complexity (AC): Low

▪ Privileges Required (PR): Low

▪ User Interaction (UI): Required

▪ Scope (S): Changed

▪ Confidentiality Impact (C): High

▪ Integrity Impact (I): High

▪ Availability Impact (A): High

Affected Vendors & Systems

Vendor Unknown

References & Advisory Links

https://wpscan.com/vulnerability/45bc7096-5d04-4fe6-a332-31aed507a3a0/

Metadata Profile

Database Authority

European Union Agency for Cybersecurity (ENISA) EUVD

Assigner

WPScan

EPSS Probability

Known Aliases

CVE-2026-82843 GHSA-rwfr-37x7-2rr8

Published On

2026-09-23

Last Updated

2026-09-23