What the vulnerability does
01Description
Missing Authorization vulnerability in microsoftstart MSN Partner Hub microsoft-start allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects MSN Partner Hub: from n/a through <= 2.9.
Explanation of Vulnerability in Simple Terms
02Summary
MSN Partner Hub versions 2.9 and earlier contain an authorization flaw that allows authenticated users to read data they should not have access to. An attacker with a low-privilege account can view sensitive information without additional interaction. The vulnerability affects the confidentiality of data but does not allow modification or service disruption.
What an attacker can do
03Attacker Capabilities
Read sensitive data from other users or restricted areas of the site.
Potential impact on your site
04Site Impact
User data may be exposed to other authenticated users; review access logs and consider credential rotation.
Conditions required to exploit
05Prerequisites
Attacker must have a valid low-privilege account on the site.
Key dates
06Disclosure timeline
October 27, 2025
CVE published
April 28, 2026
Record updated