Improper Input Validation
An issue was discovered in certain Apple products. macOS before 10.13.4 is affected. The issue involves the "PDFKit" component. It allows remote attackers to bypass intended restrictions on visiting URLs within a PDF document.
CWE-20 - Improper Input Validation
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.