They take your click IDs and leak them through exit links.
Passing tracking identifiers through redirects or links. Attribution hijacking. Click IDs (gclid, fbclid, utm_*) are captured and appended to outbound links, enabling third parties to claim attribution credit or map your paid traffic sources.
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.
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/C18