AzureAD Microsoft Identity Web up to 3.8.1 Microsoft.Identity.Abstractions log file

Summaryinfo

A vulnerability classified as problematic has been found in AzureAD Microsoft Identity Web up to 3.8.1. This issue affects some unknown processing of the component Microsoft.Identity.Abstractions. The manipulation leads to log file. This vulnerability is documented as CVE-2025-32016. The attack needs to be performed locally. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in AzureAD Microsoft Identity Web up to 3.8.1. This issue affects some unknown processing of the component Microsoft.Identity.Abstractions. The manipulation with an unknown input leads to a log file vulnerability. Using CWE to declare the problem leads to CWE-532. Information written to log files can be of a sensitive nature and give valuable guidance to an attacker or expose sensitive user information. Impacted is confidentiality. The summary by CVE is:

Microsoft Identity Web is a library which contains a set of reusable classes used in conjunction with ASP.NET Core for integrating with the Microsoft identity platform (formerly Azure AD v2.0 endpoint) and AAD B2C. This vulnerability affects confidential client applications, including daemons, web apps, and web APIs. Under specific circumstances, sensitive information such as client secrets or certificate details may be exposed in the service logs of these applications. Service logs are intended to be handled securely. Service logs generated at the information level or credential descriptions containing local file paths with passwords, Base64 encoded values, or Client secret. Additionally, logs of services using Base64 encoded certificates or certificate paths with password credential descriptions are also affected if the certificates are invalid or expired, regardless of the log level. Note that these credentials are not usable due to their invalid or expired status. To mitigate this vulnerability, update to Microsoft.Identity.Web 3.8.2 or Microsoft.Identity.Abstractions 9.0.0.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2025-32016 since 04/01/2025. The exploitation is known to be difficult. An attack has to be approached locally. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1592 for this issue.

Upgrading to version 3.8.2 eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• AzureAD

Name

• Microsoft Identity Web

Version

• 3.8.0
• 3.8.1

License

• commercial

CPE 2.3info

• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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