They take control of your page and modify it for their benefit.
Modifying page content, injecting elements, or altering behavior. Man-in-the-browser. Scripts inject overlays, modify pricing, redirect clicks, insert competitor content, or alter page behavior in ways the site owner never authorized.
What It Costs You
CAC Subsidization
Visitor data captured on a site can flow into data broker networks and identity graphs, eventually surfacing in competitor prospecting tools. The original company paid to acquire the traffic; competitors pay pennies to intercept the lead.
Signal Corruption
Overlapping tracking mechanisms corrupt attribution data. Multiple sources claim credit for single conversions. Pipeline metrics diverge from reality. Marketing decisions get made on numbers that can’t be trusted.
GTM Attack Surface
Third-party scripts execute with full privileges on every page load. Dangerous code patterns, external dependencies, and data interception turn marketing infrastructure into attack vectors. One compromised dependency compromises the entire site.
Related Advisories
No published advisories reference this code yet.
Investigations are ongoing.
Blackout uses security frameworks to protect AGAINST vendors, not FOR them. We do not notify vendors. We do not provide remediation windows. If you're using a vendor flagged by this code, the advisory is your evidence.
Permanent URL: deployblackout.com/bti/codes/C19