express-sanitizer
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Notice: The primary dependency for this library hasn't been updated in 5 years. Before using this library, consider other options such as express-validator.
An express middleware for Caja-HTML-Sanitizer, which wraps Google Caja sanitizer.
A useful complement to the express-validator -- to fill a gap now that XSS sanitization support has been removed from that module's parent node-validator.
yarn add express-sanitizer
or
npm install --save express-sanitizer
Import the module
const expressSanitizer = require('express-sanitizer');
Mount the middleware below the express.json() (or, prior to express v4.16, bodyParser()) instantiation and above mounting of your routes
app.use(express.json());
// Mount express-sanitizer middleware here
app.use(expressSanitizer());
app.post('/', function(req, res, next) {
// replace an HTTP posted body property with the sanitized string
const sanitizedString = req.sanitize(req.body.propertyToSanitize);
// send the response -- res.body.sanitized = " world"
res.send({ sanitized: sanitizedString });
});
The string
'<script>hello</script> world'
will be sanitized to ' world'.
This is a basic implementation of Caja-HTML-Sanitizer with the specific purpose of mitigating against persistent XSS risks (note the borderline abandonware comments in that repo!).
This module trusts the dependencies to provide basic persistent XSS risk mitigation. A user of this package should review all packages and make their own decision on security and fitness for purpose.
Copyright (c) 2021 Mark Andrews 20metresbelow@gmail.com, MIT License
FAQs
Express middleware for the sanitizer module.
The npm package express-sanitizer receives a total of 4,405 weekly downloads. As such, express-sanitizer popularity was classified as popular.
We found that express-sanitizer demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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