Description
Unauthenticated Broken Authentication in OAuth Single Sign On – SSO (OAuth Client) <= 7.0.0 versions.
Published: 2026-08-13
Score: 9.8 Critical
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

Unauthenticated broken authentication in the miniOrange OAuth Single Sign On – SSO (OAuth Client) WordPress plugin versions 7.0.0 and earlier allows attackers to log in as any user or bypass authentication entirely. The flaw is rooted in insufficient validation of OAuth claims, identified as CWE‑290. Successful exploitation would give an attacker unauthorized access to the WordPress site’s administrative functions, content, and potentially sensitive user data, leading to full site compromise.

Affected Systems

Vendors: miniOrange. Product: WordPress OAuth Single Sign On – SSO (OAuth Client) plugin. Affected versions: all releases up to and including 7.0.0. Updated versions start at 7.0.1 and contain the vulnerability fix.

Risk and Exploitability

CVSS score is 9.8, indicating a critical severity. EPSS score is not available, so current exploitation probability cannot be quantified. The vulnerability is not currently listed in CISA’s KEV catalog. Attackers can exploit the flaw remotely without authentication by manipulating the plugin’s SSO flow; the flaw does not require additional privileges or local access.

Generated by OpenCVE AI on August 13, 2026 at 16:35 UTC.

Remediation

Vendor Solution

Update the WordPress OAuth Single Sign On – SSO (OAuth Client) plugin to the latest available version (at least 7.0.1).

OpenCVE Recommended Actions

  • Upgrade the miniOrange OAuth Single Sign On – SSO (OAuth Client) WordPress plugin to version 7.0.1 or later.
  • If an update cannot be applied immediately, disable the plugin in the WordPress dashboard and remove its files from the server.
  • Review and restrict access to the plugin’s OAuth endpoints via web‑application firewall rules or by configuring the server to block unauthenticated access.

Generated by OpenCVE AI on August 13, 2026 at 16:35 UTC.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

History

Fri, 14 Aug 2026 13:00:00 +0000

Type Values Removed Values Added
First Time appeared Miniorange
Miniorange oauth Single Sign On – Sso (oauth Client)
Wordpress
Wordpress wordpress
Vendors & Products Miniorange
Miniorange oauth Single Sign On – Sso (oauth Client)
Wordpress
Wordpress wordpress

Thu, 13 Aug 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Thu, 13 Aug 2026 14:00:00 +0000

Type Values Removed Values Added
Description Unauthenticated Broken Authentication in OAuth Single Sign On – SSO (OAuth Client) <= 7.0.0 versions.
Title WordPress OAuth Single Sign On – SSO (OAuth Client) plugin <= 7.0.0 - Broken Authentication vulnerability
Weaknesses CWE-290
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

Subscriptions

Miniorange Oauth Single Sign On – Sso (oauth Client)
Wordpress Wordpress
cve-icon MITRE

Status: PUBLISHED

Assigner: Patchstack

Published:

Updated: 2026-08-13T15:24:26.180Z

Reserved: 2026-02-25T12:13:06.634Z

Link: CVE-2026-28008

cve-icon Vulnrichment

Updated: 2026-08-13T15:24:21.649Z

cve-icon NVD

Status : Deferred

Published: 2026-08-13T14:16:57.687

Modified: 2026-08-14T19:09:20.713

Link: CVE-2026-28008

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-14T12:15:40Z

Weaknesses
  • CWE-290

    Authentication Bypass by Spoofing