fix: [vulnerability_lookup] Better reference between vulnerability and weakness objects

misp_modules/modules/expansion/vulnerability_lookup.py

@@ -219,8 +219,10 @@ class VulnerabilityLookupParser(VulnerabilityParser):
                 weakness = MISPObject('weakness')
                 for field, value in cwe.items():
                     weakness.add_attribute(field, value)
-                weakness.add_reference(related_vulnerability.uuid, 'leads-to')
                 self.misp_event.add_object(weakness)
+                related_vulnerability.add_reference(
+                    weakness.uuid, 'weakened-by'
+                )
 
         return vulnerability_object.uuid