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Monitoring, Securing, Optimizing 3rd party scripts

Keeping track of 3rd party scripts, taking away obscurity

How c/side makes the difference

You'll know what gets delivered to your user's browser 100% of the time, and we'll make the scripts up to 30% faster.

3rd party scripts are a major risk

3rd party scripts have unlimited reign in the browser of your users. When it goes wrong, it goes really wrong.

Negative press, potential lawsuits, and damage claims following a security incident.

You don't know what the user gets in their browser


of most commonly used scripts change at least weekly


3rd-party scripts on
the average website

Know the dangers of
hijacked scripts

Can rewrite a page
Crypto wallet IDs can simply be changed
'Sign up' can redirect to a different site
Listen in on keystrokes

Featured in

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It's Time to Take Action

PCI DSS 4.0 (specifically 6.4.3 and 11.6.1) mandates entities handling card data to implement tamper-detection mechanisms by March 31st, 2025. This aims to mitigate Magecart attacks by alerting on unauthorized changes to HTTP headers and payment content.

The value we add

How we're different

  • Real time flow-through monitoring
  • No sampling, we cover 100%
  • Caching scripts, making them faster
  • Detection mechanisms that actually work
  • Using AI to make findings easily understandable
Dashboard preview

Detect 0-day attacks

C/side is the only fully autonomous detection tool for assessing 3rd party scripts. We do not rely purely on threat feed intel or easy to circumvent detections. Using historical context and AI to review the payload and behaviour of scripts.


1 million scripts processed in last 24h

C/side is crawling many sites to get ahead of new attacks. All scripts get processed by us and we improve our detection methods. We monitor over 70 attributes and on top using various AI detection mechanisms to review the scripts. Making our solution the most advanced detection mechanism in the space to date.

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Magento icon

Works with your favorite stack

Use c/side on your ecommerce store. Whether you use Shopify, Magento, Woocommerce or built a Next.js or virtually any front-end. C/side is available to you.

Latest blog posts

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What is an attack vector and what are hidden ones

An attack vector in cyber security is the way an attacker takes advantage of security weaknesses. Some are more obscure than others. One that’s been our focus, is third party JavaScript. Since these scripts are installed by the website owner yet executed in the visitors' browsers, they're in a unique ...

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Web supply chain attack through trojanized jQuery on npm, GitHub and CDNs

Attacks have been found in trojanized jQuery on GitHub, npm and jsDelivr in a new web supply chain attack. Each package had a copy of jQuery with one small change: the β€˜end’ function . This is part of the jQuery prototype, and was modified to include additional malicious code. In ...

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How expired domains lead to cyber attacks

This is a multifaceted issue. Simply buying an expired domain isn't illegal. However, if a domain name is trademarked, then purchasing it (known as cybersquatting) could potentially breach copyright laws. But this of course will not defer attackers who usually remain anonymous and unnoticed.

Get Started Today

Start monitoring and securing 3rd party scripts
on your websites today.