Look up XSS in Wiktionary, the free dictionary.
XSS is cross-site scripting, a type of computer security vulnerability.
XSS may also refer to:
- XSS file, a Microsoft Visual Studio Dataset Designer Surface Data file
- X11 Screen Saver extension, of X11
- Assan language (ISO 639-3 code)
- Xbox Series S, a digital-only video game console