container audit
GTM-57GKPXPG
12 tags, 7 custom scripts, 5 third-party hosts — an ordinary container, near the middle of what we measure (median: 39 tags, 4 custom scripts).
- 7 custom HTML tags carrying 3 KB of JavaScript. This runs on every page the container loads on.
- 5 third-party hosts reachable from its tags.
inner-htmlis uncommon — under 6% of the containers we have measured have it. That is context rather than a verdict: a server container is rarer still and is a sign of a mature setup. What it means is in the finding itself.
Tags12
Custom scripts7
Third parties5
Delivered375 KB
Versions29
What we observed
A real browser loaded national-geographic.pl a month ago and recorded every request it made. This is what happened, as distinct from what the container is configured to do. It is one page load — anything that fires only deeper in the site did not fire here.
Container loaded from
googletagmanager.com — GoogleMeasurement sent to
www.national-geographic.pl — not Google, at /api/gtm/g/collectMeasurement is first-party; the container still loads from Google. These are separate decisions, and this is the more common of the two.
Forwarded to
GA4 ×8 — read from the measurement id, not the hostname
Consent
Quantcast answered its own API. Measurement fired beforehand but carried no identifier —
analytics_storage was denied, which is Consent Mode working as designed rather than a gap. 4 hosts appeared only after consent was granted. Google recorded gcs=G100 (all denied).Third parties contacted
25 hosts — cdn.12341234.pl, securepubads.g.doubleclick.net, use.typekit.net, images.immediate.co.uk, cdn.speedcurve.com, www.googletagmanager.com, pro.hit.gemius.pl, www.datadoghq-browser-agent.com, and 17 more
dataLayer events seen
Site Data, Page Data, gtm.js, Hydration, gtm.dom, Consent Known, gtm.load, Consent Status Ready
Where the data goes
Confirmed — a browser watched this site send measurement data to www.national-geographic.pl, not to Google. observed on national-geographic.pl More info »
Findings
Ordered by consequence. review has a concrete cost when it bites; info is real but depends on your setup. Seen is how common it is across the containers we have measured — reported separately on purpose, because common and harmless are different claims.
reviewWrites innerHTML (1)
1 piece of custom code assign to innerHTML.
WhyAssigning innerHTML parses the string as HTML. If any of it comes from the URL, the page or a cookie, that is a script-injection route into your own site.
CheckCheck whether the assigned value is a fixed template or built from something a visitor can influence.
Seenseen in 5.7% of 46,522 containers measured
infoConsent configuration detected (2)
The container declares one or more consent signals.
WhyConsent handling is present in the container. This describes what the artifact declares; what actually happened on the page is measured separately, above.
CheckConfirm these settings match the consent policy you intend to enforce, and compare them with the before-and-after observation.
Seenseen in 44.6% of 46,522 containers measured
infoLoads JavaScript from another host (1)
1 piece of custom code fetch and run JavaScript from another host.
WhyWhatever that host serves executes with full access to the page — it can read the DOM, cookies and form fields. The code is not in this container, so it can change at any time without any change here.
CheckConfirm you recognise every host below and that someone owns the relationship. A host you cannot name is the one to chase.
Seenseen in 54.4% of 46,522 containers measured
Third parties it can reach
Each host is a party that can execute code or receive data in a visitor's browser. Follow one to see who else loads it. More info »
track.adform.net ×2burdamedia.user.com ×1cdn.12341234.pl ×1edipresse.hit.gemius.pl ×1www.google-analytics.com ×1
What the custom templates can do
Custom templates are third-party code shipped inside the container. Injecting scripts and running page globals is ordinary for them — most tag templates need it to work — so this is an inventory, not a warning. It lists the capability each template declares so you can match it against templates you meant to install.
__cvt_177597576_18 private injects code from www.clarity.ms · runs page-level globalsDetected on
Sites observed loading this container. A container used across many hosts is a shared template; one on a single host is a bespoke build. Follow a site to see every container it loads.
What this audit describes
Containers change. These findings describe one specific artifact, and you can re-fetch it to check this reading.
| Container | GTM-57GKPXPG |
|---|---|
| Published version | 29 — the identity of this configuration. It changes only when someone publishes. |
| Read at | 2026-08-22 09:47:46 UTC (a month ago) |
| Source | https://www.googletagmanager.com/gtm.js?id=GTM-57GKPXPG |
| Body checksum | 64866e24dac153b1ea0c87cc8c5a165921da9ad5c74a10993c4d246804036454Evidence of the exact bytes we read, not an identity: Google varies the response per request, so re-fetching an unchanged container yields a different checksum. Compare the published version instead. |
Re-audit
This reading is from a month ago. A container can be republished at any time, and nothing here updates on its own — a fresh read is the only way to know whether it still says this. Running it again replaces this page in place, so the link keeps working.
Put this container under version control. Tagora exports it to a repository you own, so every change arrives as a pull request. How it works »