Fix tempalte-id validation (#5261)

* Fix tempalte-id validation

* Add checks to mandatory fields

* misc update

pkg/templates/templates.go

@@ -23,6 +23,7 @@ import (
 	"github.com/projectdiscovery/nuclei/v3/pkg/protocols/websocket"
 	"github.com/projectdiscovery/nuclei/v3/pkg/protocols/whois"
 	"github.com/projectdiscovery/nuclei/v3/pkg/templates/types"
+	"github.com/projectdiscovery/nuclei/v3/pkg/utils"
 	"github.com/projectdiscovery/nuclei/v3/pkg/workflows"
 	errorutil "github.com/projectdiscovery/utils/errors"
 	fileutil "github.com/projectdiscovery/utils/file"
@@ -326,6 +327,17 @@ func (template *Template) UnmarshalYAML(unmarshal func(interface{}) error) error
 	}
 	*template = Template(*alias)
 
+	if !ReTemplateID.MatchString(template.ID) {
+		return errorutil.New("template id must match expression %v", ReTemplateID).WithTag("invalid template")
+	}
+	info := template.Info
+	if utils.IsBlank(info.Name) {
+		return errorutil.New("no template name field provided").WithTag("invalid template")
+	}
+	if info.Authors.IsEmpty() {
+		return errorutil.New("no template author field provided").WithTag("invalid template")
+	}
+
 	if len(template.RequestsHTTP) > 0 || len(template.RequestsNetwork) > 0 {
 		_ = deprecatedProtocolNameTemplates.Set(template.ID, true)
 	}