olemus
veebilehe skripte nakatav kahjurkood, mis võib moodustada veebipõhiseid bottnette; levib eeskätt populaarsete veebifoorumite kaudu
= a virus aimed at exploiting browser vulnerabilities, to breach browser security with a client code script

ülevaateid
http://combofix.org/what-are-web-scripting-viruses-how-to-detect-and-remove-it.php
https://www.internetsecurity.tips/what-is-a-web-scripting-virus-how-to-detect-and-remove-it/
https://www.quickstart.com/blog/all-you-should-know-about-web-scripting-virus-and-how-to-counter-it/

näiteid
JS.Fortnight: https://www.f-secure.com/v-descs/fortnight.shtml