🛡️ Sentinel: [HIGH] Fix SSRF in WebDAV connection test

Co-authored-by: christianlouis <361235+christianlouis@users.noreply.github.com>

app/api/integrations.py

@@ -574,14 +574,9 @@ def _test_webdav_connection(config: dict[str, Any] | None, credentials: dict[str
     # Block requests to private/internal IPs to prevent SSRF
     hostname = parsed.hostname or ""
     if hostname:
-        try:
-            addr = ipaddress.ip_address(hostname)
-            if addr.is_private or addr.is_loopback or addr.is_link_local:
-                return {"success": False, "message": "URLs pointing to internal or private networks are not allowed"}
-        except ValueError:
-            # Hostname is not an IP literal — allow DNS names through
-            if hostname in ("localhost", "localhost.localdomain"):
-                return {"success": False, "message": "URLs pointing to localhost are not allowed"}
+        from app.utils.network import is_private_ip
+        if is_private_ip(hostname):
+            return {"success": False, "message": "URLs pointing to internal or private networks are not allowed"}
 
     try:
         import base64