Is CVE-2026-82843 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-82843 being exploited in the wild.

How severe is CVE-2026-82843?

Critical severity, with a CVSS score of 9, published 23 September 2026.

Which products and versions are affected?

miniOrange WP OAuth Server before 6.4.0.

Is there a fix for CVE-2026-82843?

A patch was published on 2026-09-21: Fixed in version 6.4.0 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-82843 attacked?

It is attacked over the network.

Am I affected by CVE-2026-82843?

Check whether you run miniOrange WP OAuth Server at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-82843: WP OAuth Server OpenID Connect identity assertion binding bypass

CVE-2026-82843 · Severity: critical · CVSS 9 · Published 2026-09-23

WP OAuth Server is a WordPress plugin that enables single sign-on authentication via OpenID Connect, allowing external applications to trust user identity assertions issued by the site. The plugin fails to properly bind identity assertions to specific authorization requests, instead returning the assertion of whichever user authenticated most recently. An attacker with a Subscriber role or higher can exploit this to obtain a valid identity assertion for any user, including administrators, and gain unauthorized access to all applications using the site for single sign-on.

Vendors: miniOrange.

Quick answers

Is CVE-2026-82843 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-82843 being exploited in the wild.
How severe is CVE-2026-82843?: Critical severity, with a CVSS score of 9, published 23 September 2026.
Which products and versions are affected?: miniOrange WP OAuth Server before 6.4.0.
Is there a fix for CVE-2026-82843?: A patch was published on 2026-09-21: Fixed in version 6.4.0 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-82843 attacked?: It is attacked over the network.
Am I affected by CVE-2026-82843?: Check whether you run miniOrange WP OAuth Server at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The vulnerability is an authentication bypass in the OpenID Connect identity assertion generation mechanism (CWE-287: Improper Authentication). The vulnerable component fails to bind issued ID tokens to the specific authorization grant being exchanged, allowing privilege escalation via token substitution. Any authenticated user with Subscriber role or above can trigger the issuance of identity assertions for other users by manipulating the authentication flow; the fix is available in version 6.4.0.

Affected products

MiniOrange WP OAuth Server before 6.4.0

Timeline

2026-09-21: disclosed
2026-09-21: patched: Fixed in version 6.4.0

References

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

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