Most procurement teams vet marketing vendors on price, turnaround time, and a portfolio of past client wins, then hand over admin credentials to the CMS as an afterthought. That ordering is backward. It's how a single sponsored blog post ends up handing an outside contractor standing write access to a production environment. Before any contract gets signed, security teams should ask who touches the codebase, what permissions they hold, and how long those permissions persist after the engagement ends. Even a straightforward engagement for outsourced seo services can involve plugin installs, redirect changes, and direct database access, all of which carry real risk if nobody checked the vendor's own security posture first.
Security teams that would never approve a new SaaS integration without a SOC 2 report or a signed data processing agreement routinely let marketing vendors skip that entire process. The assumption seems to be that a blog post or a batch of meta tag updates can't do much damage, but a compromised FTP credential or an overly broad CMS role doesn't care about the vendor's job title. A marketing contractor with admin access to WordPress has, functionally, the same blast radius as a poorly vetted developer contractor, yet the two rarely go through the same review. That gap is where a lot of real incidents start, not with a sophisticated attack but with a vendor account nobody remembered to scope down.
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