@blakeembrey/template vulnerable to code injection when attacker controls template input

Impact

It is possible to inject and run code within the template if the attacker has access to write the template name.

const { template } = require('@blakeembrey/template');

template("Hello {{name}}!", "exploit() {} && ((()=>{ console.log('success'); })()) && function pwned");

Patches

Upgrade to 1.2.0.

Workarounds

Don’t pass untrusted input as the template display name, or don’t use the display name feature.

References

Fixed by removing in https://github.com/blakeembrey/js-template/commit/b8d9aa999e464816c6cfb14acd1ad0f5d1e335aa.