Case Studyoauthchatgptmicrosoft entraconsent attacks
Researchers Analyze ChatGPT OAuth Consent Risk
8.1
Red Canary's Threat Research team presents a 2025-12-02 Entra ID case study showing a ChatGPT third-party service principal granted Mail.Read and offline_access permissions for [email protected] from IP 3.89.177.26. The benign-classified investigation outlines required Azure AuditLogs events, detection correlation by CorrelationId, and remediation steps, offering practical guidance for detecting and mitigating OAuth consent attacks across Microsoft Entra tenants.
Key Points
- 1Documented OAuth consent granting ChatGPT Mail.Read access for user TestUser on 2025-12-02
- 2Highlights risk because Mail.Read and offline_access scopes can expose email data and enable abuse
- 3Recommend correlating AuditLogs Consent and Add service principal events via CorrelationId for detection
Scoring Rationale
High practical detection value and industry-wide relevance, limited novelty beyond known OAuth consent attack patterns.
Sources
Public references used for this report.
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