CVE-2026-57807 CRITICAL

CVE-2026-57807: WordPress OAuth Single Sign On - SSO (OAuth Client) plugin <= 38.5.8 - Broken Authentication vulnerability

Vendor Miniorange Security Software Pvt Ltd.
Product OAuth Single Sign On - SSO (OAuth Client)
Weakness CWE-288
Published July 10, 2026
Last update July 13, 2026

CVSS base score

9.8/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity High

CVSS vector

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

What the vulnerability does

01Description

Authentication Bypass Using an Alternate Path or Channel vulnerability in miniOrange Security Software Pvt Ltd. OAuth Single Sign On - SSO (OAuth Client) allows Password Recovery Exploitation. This issue affects OAuth Single Sign On - SSO (OAuth Client): from n/a through 38.5.8.

Explanation of Vulnerability in Simple Terms

02Summary

The OAuth Single Sign On plugin for miniOrange contains an authentication bypass vulnerability that allows unauthenticated attackers to gain full control over the site. The flaw stems from improper validation of OAuth tokens, enabling attackers to forge authentication credentials without valid user interaction. This affects all versions up to 38.5.8. Site administrators should update immediately to a patched version.

What an attacker can do

03Attacker Capabilities

Bypass authentication and gain full administrative access to the site without valid credentials.

Potential impact on your site

04Site Impact

Complete compromise of site security; attacker can read, modify, or delete all data and user accounts.

Conditions required to exploit

05Prerequisites

Network access only; no authentication or user interaction required.

Key dates

06Disclosure timeline

July 10, 2026 CVE published
July 13, 2026 Record updated