WordPress TrueBooker plugin <= 1.2.9 - Settings Change vulnerability

{
                    "vendor": "ThemetechMount",
                    "collectionURL": "https://wordpress.org/plugins",
                    "defaultStatus": "unaffected",
                    "packageName": "truebooker-appointment-booking",
                    "product": "TrueBooker",
                    "versions": [
                        {
                            "lessThanOrEqual": "1.2.9",
                            "status": "affected",
                            "version": "n/a",
                            "versionType": "custom"
                        }
                    ]
                }