diff --git a/cmd/lists.go b/cmd/lists.go
index 0570215b..0968b121 100644
--- a/cmd/lists.go
+++ b/cmd/lists.go
@@ -176,12 +176,12 @@ func listPerm(next echo.HandlerFunc) echo.HandlerFunc {
 
 		// Define permissions based on HTTP read/write.
 		var (
-			permAll = "lists:manage_all"
-			perm    = "list:manage"
+			permAll = models.PermListManageAll
+			perm    = models.PermListManage
 		)
 		if c.Request().Method == http.MethodGet {
-			permAll = "lists:get_all"
-			perm = "list:get"
+			permAll = models.PermListGetAll
+			perm = models.PermListGet
 		}
 
 		// Check if the user has permissions for all lists or the specific list.
diff --git a/cmd/subscribers.go b/cmd/subscribers.go
index 8907c436..7947d306 100644
--- a/cmd/subscribers.go
+++ b/cmd/subscribers.go
@@ -213,7 +213,7 @@ func handleCreateSubscriber(c echo.Context) error {
 	}
 
 	// Filter lists against the current user's permitted lists.
-	listIDs := filterListsByPerm(req.Lists, user)
+	listIDs := user.FilterListsByPerm(req.Lists, false, true)
 
 	// Insert the subscriber into the DB.
 	sub, _, err := app.core.InsertSubscriber(req.Subscriber, listIDs, nil, req.PreconfirmSubs)
@@ -258,7 +258,7 @@ func handleUpdateSubscriber(c echo.Context) error {
 	}
 
 	// Filter lists against the current user's permitted lists.
-	listIDs := filterListsByPerm(req.Lists, user)
+	listIDs := user.FilterListsByPerm(req.Lists, false, true)
 
 	out, _, err := app.core.UpdateSubscriberWithLists(id, req.Subscriber, listIDs, nil, req.PreconfirmSubs, true)
 	if err != nil {
@@ -368,7 +368,7 @@ func handleManageSubscriberLists(c echo.Context) error {
 	}
 
 	// Filter lists against the current user's permitted lists.
-	listIDs := filterListsByPerm(req.TargetListIDs, user)
+	listIDs := user.FilterListsByPerm(req.TargetListIDs, false, true)
 
 	// Action.
 	var err error
@@ -484,8 +484,8 @@ func handleManageSubscriberListsByQuery(c echo.Context) error {
 	}
 
 	// Filter lists against the current user's permitted lists.
-	sourceListIDs := filterListsByPerm(req.ListIDs, user)
-	targetListIDs := filterListsByPerm(req.TargetListIDs, user)
+	sourceListIDs := user.FilterListsByPerm(req.ListIDs, false, true)
+	targetListIDs := user.FilterListsByPerm(req.TargetListIDs, false, true)
 
 	// Action.
 	var err error
@@ -669,7 +669,7 @@ func hasSubPerm(u models.User, subIDs []int, app *App) error {
 		return nil
 	}
 
-	if _, ok := u.PermissionsMap["subscribers:get_all"]; ok {
+	if _, ok := u.PermissionsMap[models.PermSubscribersGetAll]; ok {
 		return nil
 	}
 
@@ -697,31 +697,14 @@ func filterListQeryByPerm(qp url.Values, user models.User, app *App) ([]int, err
 			return nil, echo.NewHTTPError(http.StatusBadRequest, app.i18n.T("globals.messages.invalidID"))
 		}
 
-		listIDs = []int{}
-		for _, id := range ids {
-			if _, ok := user.ListPermissionsMap[id]; ok {
-				listIDs = append(listIDs, id)
-			}
-		}
+		listIDs = user.FilterListsByPerm(ids, true, true)
 	} else {
 		// There are no incoming params. If the user doesn't have permission to get all subscribers,
 		// filter by the lists they have access to.
-		if _, ok := user.PermissionsMap["subscribers:get_all"]; !ok {
+		if _, ok := user.PermissionsMap[models.PermSubscribersGetAll]; !ok {
 			listIDs = user.GetListIDs
 		}
 	}
 
 	return listIDs, nil
 }
-
-// filterListsByPerm filters the given list IDs against the given user's permitted lists.
-func filterListsByPerm(listIDs []int, user models.User) []int {
-	out := make([]int, 0, len(listIDs))
-	for _, id := range listIDs {
-		if _, ok := user.ListPermissionsMap[id]; ok {
-			listIDs = append(listIDs, id)
-		}
-	}
-
-	return out
-}
diff --git a/models/models.go b/models/models.go
index 468573f8..51d18e3f 100644
--- a/models/models.go
+++ b/models/models.go
@@ -814,3 +814,45 @@ func (h Headers) Value() (driver.Value, error) {
 
 	return "[]", nil
 }
+
+func (u *User) HasPerm(perm string) bool {
+	_, ok := u.PermissionsMap[perm]
+	return ok
+}
+
+// FilterListsByPerm returns list IDs filtered by either of the given perms.
+func (u *User) FilterListsByPerm(listIDs []int, get, manage bool) []int {
+	// If the user has full list management permission,
+	// no further checks are required.
+	if get {
+		if _, ok := u.PermissionsMap[PermListGetAll]; ok {
+			return listIDs
+		}
+	}
+	if manage {
+		if _, ok := u.PermissionsMap[PermListManageAll]; ok {
+			return listIDs
+		}
+	}
+
+	out := make([]int, 0, len(listIDs))
+
+	// Go through every list ID.
+	for _, id := range listIDs {
+		// Check if it exists in the map.
+		if l, ok := u.ListPermissionsMap[id]; ok {
+			// Check if any of the given permission exists for it.
+			if get {
+				if _, ok := l[PermListGet]; ok {
+					out = append(out, id)
+				}
+			} else if manage {
+				if _, ok := l[PermListManage]; ok {
+					out = append(out, id)
+				}
+			}
+		}
+	}
+
+	return out
+}