UnratedNuGetAmendedPublished
Server side request forgery in SwaggerUI
GHSA-qrmm-w75w-3wpx
- Affected
- NuGet swashbuckle.aspnetcore.swaggerui < 6.3.0
- Fixed in
- 6.3.0· Vendor fix available
- Issue
- SwaggerUI supports displaying remote OpenAPI definitions through the ?url parameter. This enables robust demonstration capabilities on sites like petstore.swagger.io, editor.swagger.io, and similar sites, where users often want to see what their OpenAPI definitions would look like rendered. However, this functionality may pose a risk for users who host their own SwaggerUI instances. In particular, including remote OpenAPI definitions opens a vector for phishing attacks by abusing the trusted names/domains of self-hosted instances. An example scenario abusing this functionality could take the following form: - https://example.com/api-docs hosts a version of SwaggerUI with ?url= query parameter enabled. - Users will trust the domain https://example.com and the contents of the OpenAPI definition. - A malicious actor may craft a similar OpenAPI definition and service that responds to the defined APIs at https://evildomain. - Users mistakenly click a phishing URL like…
Recommended action: Upgrade to 6.3.0 or later, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.