OVER 250 MAGENTO STORES HIT OVERNIGHT AS HACKERS EXPLOIT NEW ADOBE COMMERCE FLAW

Summary from the TLDR InfoSec newsletter

Threat actors are actively exploiting CVE-2025-54236 (SessionReaper, CVSS 9.1), a critical nested deserialization vulnerability in Adobe Commerce and Magento that enables remote code execution and customer account takeover via the Commerce REST API, with over 250 attacks recorded in 24 hours. Attackers from five known IP addresses are deploying PHP webshells through ‘/customer/address_file/upload' and probing phpinfo, while 62% of Magento stores remain unpatched six weeks after Adobe's fix was released. Security teams must immediately patch all Adobe Commerce and Magento instances, block the listed attacker IPs (34.227.25.4, 44.212.43.34, 54.205.171.35, 155.117.84.134, and 159.89.12.166), and monitor for unauthorized file uploads, as this is the second critical deserialization flaw in these platforms within two years following CosmicSting (CVE-2024-34102).