I used GSAK together with the DBTextSearchMacro to identify candidates to search cache descriptions by keywords:
style,onblur,onchange,onclick,ondblclick,onerror,onfocus,onkeydown,onkeypress,onkeyup,onload,onmousedown,
onmousemove,onmouseout,onmouseover,onmouseup,onresize,onselect,onunload,javascript
But I'm still not sure, if this method catches all possible affected listings.