Once Benign Polyfill.io Code Now Exposes 100k+ Websites to Attack

June 26, 2024 | Over 100,000 websites using Polyfill JS are now vulnerable to malicious redirects to sports betting and pornography sites. Sansec researchers found that the popular open-source code, recently acquired by Funnull, generates malicious activities based on HTTP headers. This highlights the risks of relying on third-party open-source projects.

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