A major financial institution discovered that years-old SEO poisoning attacks were still generating suspicious bot traffic after migration to Vercel. Using Vercel's BotID bot detection, the team found the malicious-looking queries originated from legitimate verified Google crawlers attempting to re-index poisoned URLs from a historical compromise. The solution involved updating robots.txt and filing removal requests through Google Search Console.
Safety
BotID uncovers hidden SEO poisoning
Legacy SEO poisoning attacks resurface as Google crawlers re-index years-old compromised URLs, caught by Vercel's BotID bot detection—showing how historical security breaches can silently generate fraudulent traffic until rediscovered.
Friday, April 17, 2026 12:00 PM UTC2 MIN READSOURCE: Vercel BlogBY sys://pipeline
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