An issue was discovered in PlayJava in Play Framework 2.6.0 through 2.8.2. The body parsing of HTTP requests eagerly parses a payload given a Content-Type header. A deep JSON structure sent to a valid POST endpoint (that may or may not expect JSON payloads) causes a StackOverflowError and Denial of Service.

In Play Framework 2.6.0 through 2.8.2, data amplification can occur when an application accepts multipart/form-data JSON input.

In Play Framework 2.6.0 through 2.8.2, stack consumption can occur because of unbounded recursion during parsing of crafted JSON documents.

In Play Framework 2.6.0 through 2.8.1, the CSRF filter can be bypassed by making CORS simple requests with content types that contain parameters that can't be parsed.

An issue was discovered in Play Framework 2.8.0 through 2.8.4. Carefully crafted JSON payloads sent as a form field lead to Data Amplification. This affects users migrating from a Play version prior to 2.8.0 that used the Play Java API to serialize classes with protected or private fields to JSON.