container audit
GTM-M294V2L
This container can hand execution to 17 third parties — more than 96% of the 46,522 containers we have measured. Each serves code it controls, which can change at any time.
- 31 custom HTML tags carrying 26 KB of JavaScript — more than 80% of the 46,522 containers we have measured. This runs on every page the container loads on.
- 630 published versions — each one live for every visitor the moment it was published.
duplicate-ga4-configis uncommon — under 5% 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.
Tags209
Custom scripts31
Third parties17
Delivered753 KB
Versions630
What we observed
A real browser loaded cmcmarkets.com 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
google-analytics.com — GoogleConsent
OneTrust answered its own API. Nothing measured until it was granted — no analytics or advertising hit left the page beforehand, and 2 fired afterwards. That is the outcome consent is meant to produce. 10 hosts appeared only after consent was granted. Google recorded
gcs=G111 (all granted).Third parties contacted
25 hosts — images.ctfassets.net, webchat.conv.rs, onelinksmartscript.appsflyer.com, cdn-ukwest.onetrust.com, geolocation.onetrust.com, privacyportal-uk.onetrust.com, jssdkcdns.mparticle.com, connect.facebook.net, and 17 more
dataLayer events seen
OneTrustLoaded, OptanonLoaded, gtm_consent_default, gtm_consent_update
Where the data goes
Not observed — on the page we loaded, measurement went to Google and nowhere else. observed on cmcmarkets.com 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.
reviewHardcoded http:// URL (3)
3 pieces of custom code reference a plain http:// address.
WhyOn an https:// page the browser blocks or upgrades these. Blocked means the tag quietly stops working; upgraded only works if that host also serves https.
CheckCheck whether the hosts below still respond over https, and update the URLs.
Seenseen in 12.8% of 46,522 containers measured
reviewWrites cookies directly (1)
1 piece of custom code set cookies in code.
WhyCookies set this way bypass GTM's consent settings, because the consent checks live in the tag templates rather than in raw JavaScript.
CheckIf any of these cookies are used for analytics or advertising, confirm they are still gated on a consent decision.
Seenseen in 21.2% of 46,522 containers measured
reviewSame GA4 property configured more than once (1)
G-VW93W7Y24M is configured by 2 separate tags.
WhyEach config tag initialises the property independently, so a single page view can be counted once per tag. Sessions, users and conversion rates all inherit the error.
CheckIf more than one of these fires on the same page you are double-counting. Compare against a known-good day, or check for a step change in traffic when the second tag was added.
Seenseen in 4.8% of 46,522 containers measured
infoLoads JavaScript from another host (5)
5 pieces 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
infoConsent configuration detected (3)
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
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 »
www.google-analytics.com ×30www.googleadservices.com ×28googleads.g.doubleclick.net ×23fls.doubleclick.net ×12js.adsrvr.org ×7secure.adnxs.com ×6insight.adsrvr.org ×5d34r8q7sht0t9k.cloudfront.net ×2edge ×2secure ×2sp.analytics.yahoo.com ×2www.financeads.net ×2analytics.tiktok.com ×1us-central1-madrid-investing.cloudfunctions.net ×1utt.impactcdn.com ×1www.cmcmarkets.co.uk ×1www.dianomi.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_57337739_2255 private runs page-level globals__cvt_57337739_1720 private injects code from snap.licdn.com__cvt_57337739_1859 private injects code from static.ads-twitter.com · runs page-level globals__cvt_57337739_1860 private injects code from static.ads-twitter.com · runs page-level globals__cvt_57337739_637 private injects code from unpkg.com · runs page-level globals__cvt_5RM3Q gallery injects code from connect.facebook.net, capi-automation.s3.us-east-2.amazonaws.com · runs page-level globals__cvt_KT4F4 gallery injects code from c.amazon-adsystem.com · runs page-level globals__cvt_MR5RJ gallery injects code from edge.fullstory.com__cvt_MRQN8 gallery runs page-level globals__cvt_PBGZL gallery injects code from www.redditstatic.com · 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-M294V2L |
|---|---|
| Published version | 630 — the identity of this configuration. It changes only when someone publishes. |
| Read at | 2026-08-23 17:42:25 UTC (a month ago) |
| Source | https://www.googletagmanager.com/gtm.js?id=GTM-M294V2L |
| Body checksum | 2d85d7c45f7c8d0a6ab6a5fed1da63a9b49faaa969aebff004fdff2e12756eebEvidence 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 »