CVE-2026-82843 WP OAuth Server (Login with WordPress) - Authentication Bypass

WP OAuth Server (Login with WordPress) < 6.4.0 contains an authentication bypass caused by improper binding of OpenID Connect identity assertions to authorization grants, letting users with Subscriber role or higher authenticate as other users including administrators, exploit requires user to have Subscriber role or above.

CVSS base score 9.0 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.19% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Authentication Bypass
Impact
Broken Authentication
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
Published
23 September 2026
Updated
15 October 2026
Weakness
CWE-287

Vendor fix

Update to version 6.4.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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