CVE-2026-82843

critical · 9

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

0.2%

EPSS (exploit prob.)

8th

EPSS percentile

2026-09-23

Published

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

Weaknesses

CWE-287

References

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

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-82843