Handle unsign can generate other exceptions

app/api/views/auth_mfa.py

@@ -38,7 +38,7 @@ def auth_mfa():
     s = Signer(FLASK_SECRET)
     try:
         user_id = int(s.unsign(mfa_key))
-    except BadSignature:
+    except Exception:
         return jsonify(error="Invalid mfa_key"), 400
 
     user = User.get(user_id)

app/dashboard/views/mailbox.py

@@ -142,8 +142,9 @@ def mailbox_verify():
 
     try:
         r_id = int(s.unsign(mailbox_id))
-    except BadSignature:
+    except Exception:
         flash("Invalid link. Please delete and re-add your mailbox", "error")
+        return redirect(url_for("dashboard.mailbox_route"))
     else:
         mailbox = Mailbox.get(r_id)
         mailbox.verified = True

app/dashboard/views/mailbox_detail.py

@@ -156,7 +156,7 @@ def mailbox_confirm_change_route():
 
     try:
         r_id = int(s.unsign(mailbox_id))
-    except BadSignature:
+    except Exception:
         flash("Invalid link", "error")
         return redirect(url_for("dashboard.index"))
     else:
@@ -179,4 +179,3 @@ def mailbox_confirm_change_route():
         else:
             flash("Invalid link", "error")
             return redirect(url_for("dashboard.index"))
-