Improper neutralization of input during web page generation ('Cross-site Scripting') vulnerability in DDNS Record functionality in Synology Router Manager (SRM) before 1.3.1-9346-10 allows remote authenticated users with administrator privileges to read or write specific files containing non-sensitive information and conduct limited denial-of-service attacks by injecting arbitrary web script or HTML.
https://www.synology.com/en-global/security/advisory/Synology_SA_24_09