WordPress Haaken theme <= 1.5 - PHP Object Injection vulnerability

{
                    "vendor": "Edge-Themes",
                    "collectionURL": "https://wordpress.org/themes",
                    "defaultStatus": "unaffected",
                    "packageName": "haaken",
                    "product": "Haaken",
                    "versions": [
                        {
                            "lessThanOrEqual": "1.5",
                            "status": "affected",
                            "version": "n/a",
                            "versionType": "custom",
                            "changes": [
                                {
                                    "at": "1.6",
                                    "status": "unaffected"
                                }
                            ]
                        }
                    ]
                }