How Do You Stop Third-Party Scripts Collecting User Data?
Every third-party script on a page runs with the page's access, so a marketing pixel, a session replay tool or a script your vendor's vendor loaded can read what your visitors type. This video covers why masking and vendor approval aren't enough, and the three steps that stop it: see what every script reads and where it sends data, decide vendor by vendor (allow, limit or block), and limit the vendors you keep with vendor guardrails (on Pro), so their scripts keep working but can't read visitor input, send data, run code or store data in the browser. Script Monitoring watches the script, not the visitor: it doesn't store card numbers, passwords or form contents.
Full answer: Vendor management | Script Monitoring Platform
Transcript
You stop scripts collecting user data in three steps: see what every script reads and where it sends data, decide vendor by vendor, and limit what the vendors you keep are allowed to do. Script Monitoring is one tag that records every script on your pages, what it touches and where it sends data, in every session. Every script on a page runs with the page's access. A tag that can read a card field can read a name, an address, or a gift amount. That's a data protection question your privacy notice has to answer, even where PCI DSS doesn't reach. And it's not only the scripts you added. A tag manager loads a vendor, that vendor loads a helper, and the helper loads a pixel from a company you've never heard of. Approving a vendor isn't approving everything it brings along. Session replay is the sharpest case. It's built to capture what's on the page, including typing. Masking helps, but masking runs inside the replay script itself, so a changed version of that script decides for itself what to send. Step one: record what actually runs in the browser, not what you configured. For every script: what it touches on the page, whether it reads form inputs, where it sends data, and which script loaded it. Then watch the destinations. A skimmer's defining action is sending data somewhere new, so new destinations deserve a review queue, whoever's script it is. Step two: decide vendor by vendor. Allow it, limit it, or block it. Blocking stops every resource from that vendor, for every visitor. Often that's too blunt, because marketing needs the pixel. Step three is the middle path: vendor guardrails, on Pro. You allow a vendor's scripts, but stop what they shouldn't do on your pages: read visitor input, send data, run code, or store data in the browser. The tag keeps working. It just can't read the form. Vendors without rules of their own follow your guardrail policy, which also covers your own inline code. Not sure yet? Monitor-only mode records what would have been blocked, without stopping anything. PCI only requires this on payment pages. Many teams extend it to login and account pages, because the same class of script can harvest credentials or personal data. One boundary on our side: we watch the script, not the visitor. We don't store what users type, like card numbers, passwords or form contents. The vendor list is on every plan, free included, for 1,000 page views a month. Guardrails are on Pro, from $99 a month, with a 14-day trial. Start for free at scriptmonitoring.com.