WordPress Dental Care CPT plugin < 21.6 - PHP Object Injection vulnerability

{
                    "vendor": "Strongholdthemes",
                    "product": "Dental Care CPT",
                    "packageName": "dentalcare-cpt",
                    "collectionURL": "https://wordpress.org/plugins",
                    "defaultStatus": "unaffected",
                    "versions": [
                        {
                            "version": "0",
                            "versionType": "custom",
                            "status": "affected",
                            "lessThan": "21.6",
                            "changes": [
                                {
                                    "at": "21.6",
                                    "status": "unaffected"
                                }
                            ]
                        }
                    ]
                }