
Magento stores hit by hidden CMS-block JavaScript loaders, Sansec says
Sansec saw the latest loader on 83 stores; the wider operation has hit 953 stores since July 2025.
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Sansec saw the latest loader on 83 stores; the wider operation has hit 953 stores since July 2025.

The loader hides from scanners, and earlier waves used PolyShell and SessionReaper to plant webshells.

Sixty of those stores already carried an earlier loader, and a stored payload reruns after the domain is blocked.

Cloudflare's Page Shield ML uncovered four malicious JavaScript campaigns on storefronts, including affiliate fraud and a remote-backdoor script, that VirusTotal and URLScan missed.
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