Auth bypass in Microsoftstart Msn Partner Hub

CVE-2025-62931

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.

Vulnerability class: Broken Access Control

Published · last modified .

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.002 (14.0th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 14th percentile — 14.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2025-62931: held from 0.002 to 0.002.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2025-62931?
CVE-2025-62931 is a medium-severity vulnerability in Microsoftstart Msn Partner Hub, classified under Missing Authorization. CVSS score: 4.3/10. Published 2025-10-27.
How severe is CVE-2025-62931?
Medium severity. CVSS v3 base score is 4.3 out of 10.