fix: #13918, make arrayLimit configurable increase default to 50

cap at 100

install/package.json

@@ -124,6 +124,7 @@
         "pretty": "^2.0.0",
         "progress-webpack-plugin": "1.0.16",
         "prompt": "1.3.0",
+        "qs": "6.14.1",
         "redis": "5.10.0",
         "rimraf": "6.1.2",
         "rss": "1.2.2",

src/webserver.js

@@ -137,6 +137,12 @@ function setupExpressApp(app) {
 	app.set('view engine', 'tpl');
 	app.set('views', viewsDir);
 	app.set('json spaces', global.env === 'development' ? 4 : 0);
+
+	// https://github.com/NodeBB/NodeBB/issues/13918
+	const qs = require('qs');
+	app.set('query parser', str => qs.parse(str, {
+		arrayLimit: Math.max(100, nconf.get('queryParser:arrayLimit') || 50),
+	}));
 	app.use(flash());
 
 	app.enable('view cache');