diff --git a/app/src/Server.js b/app/src/Server.js
index a373acbc..c43f7286 100644
--- a/app/src/Server.js
+++ b/app/src/Server.js
@@ -469,12 +469,10 @@ function startServer() {
             );
 
             if (!Validator.isValidRoomName(room)) {
-                return res
-                    .status(401)
-                    .json({
-                        message:
-                            'Invalid Room name! Must be a UUID4 or an alphanumeric string without special characters or spaces.',
-                    });
+                return res.status(401).json({
+                    message:
+                        'Invalid Room name! Must be a UUID4 or an alphanumeric string without special characters or spaces.',
+                });
             }
 
             let peerUsername = '';
diff --git a/cloud/server.js b/cloud/server.js
index 0a626556..60640f72 100644
--- a/cloud/server.js
+++ b/cloud/server.js
@@ -50,7 +50,7 @@ app.post('/recSync', (req, res) => {
             return res.status(400).send('Filename not provided');
         }
 
-        if (!fileName.startsWith('Rec_') && !fileName.endsWith('.webm')) {
+        if (!isValidRecFileNameFormat(fileName)) {
             log.warn('[RecSync] - Invalid file name', fileName);
             return res.status(400).send('Invalid file name');
         }
@@ -86,3 +86,13 @@ app.post('/recSync', (req, res) => {
 app.listen(port, () => {
     log.debug(`Server is running on http://localhost:${port}`);
 });
+
+// Utils
+function isValidRecFileNameFormat(input) {
+    if (typeof input !== 'string') {
+        return false;
+    }
+    const pattern =
+        /^Rec_(?:[A-Za-z0-9-_]+|[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-4[0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12})_\d{4}_\d{2}_\d{2}_\d{2}_\d{2}_\d{2}\.(webm)$/;
+    return pattern.test(input);
+}