fix: security vulnerability that allows remote code execution (ghsa p6h4 93qp jhcm) (#7841)

src/RestWrite.js

@@ -6,6 +6,7 @@ var SchemaController = require('./Controllers/SchemaController');
 var deepcopy = require('deepcopy');
 
 const Auth = require('./Auth');
+const Utils = require('./Utils');
 var cryptoUtils = require('./cryptoUtils');
 var passwordCrypto = require('./password');
 var Parse = require('parse/node');
@@ -61,6 +62,19 @@ function RestWrite(config, auth, className, query, data, originalData, clientSDK
     }
   }
 
+  if (this.config.requestKeywordDenylist) {
+    // Scan request data for denied keywords
+    for (const keyword of this.config.requestKeywordDenylist) {
+      const match = Utils.objectContainsKeyValue(data, keyword.key, keyword.value);
+      if (match) {
+        throw new Parse.Error(
+          Parse.Error.INVALID_KEY_NAME,
+          `Prohibited keyword in request data: ${JSON.stringify(keyword)}.`
+        );
+      }
+    }
+  }
+
   // When the operation is complete, this.response may have several
   // fields.
   // response: the actual data to be returned