An issue was discovered in GCDWebServer before 3.5.3. The method moveItem in the GCDWebUploader class checks the FileExtension of newAbsolu…

An issue was discovered in GCDWebServer before 3.5.3. The method moveItem in the GCDWebUploader class checks the FileExtension of newAbsolutePath but not oldAbsolutePath. By leveraging this vulnerability, an adversary can make an inaccessible file be available (the credential of the app, for instance).