ADV190014 — Microsoft Live Accounts Elevation of Privilege Vulnerability

Executive Summary

An elevation of privilege vulnerability exists in Outlook Web Access (OWA) regarding a possible unsigned token. An attacker who successfully exploited this vulnerability could have access to another person's email inbox. To exploit this vulnerability, an attacker would first have to replace an unsigned token with a different one. This vulnerability has been mitigated for all users' Microsoft Live accounts.

Overview

Important

MS Severity

Not Exploited

MS Exploit Status

Not Found

MS Exploit Likelihood

Category Elevation of Privilege

Released Aug 13 2019

Last Updated Aug 13 2019

Publicly Disclosed No

CISA KEV Not Listed

Known Exploits None Known

EPSS Score

No EPSS score available for this CVE.

View on FIRST.org

Exploits & PoC

No public exploit or PoC has been linked for this CVE yet. When available, references are sourced from public repositories and may be unverified or non-functional — review carefully before use.

Detection Rules

No public Sigma or Nuclei detection rule has been mapped to this CVE yet. Coverage is concentrated on exploited / high-profile vulnerabilities; check SigmaHQ for updates.

Acknowledgments

Terry Zhang of Tophant
Ron Chan

References

MSRC Advisory MITRE NVD