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Sansec says Magento CMS loaders hit 953 stores since 2025
The Hacker News, citing Sansec, reported that an unknown actor injected scanner-evading JavaScript loaders into 953 online stores, mostly Magento, in a campaign tracked since July 2025.
An unknown actor has injected JavaScript loaders into 953 online stores, most of them Magento, in a campaign Dutch e-commerce security firm Sansec has tracked since July 2025, The Hacker News reported Monday1.
Sansec said the injected code, placed in Magento CMS blocks that render static storefront content, causes a visitor's browser to query an attacker-controlled server, which then checks whether the client looks like a shopper or a security scanner1. Scanners receive nothing, according to the company as reported by The Hacker News1.
Five domains have been tied to the campaign over time: manulfie.click (July 2025), neswnsssn.click (December 2025), lanhd6549tdhse.top (March 2026), additionalver.com (June 2026) and deepveindrilling.com (October 2026)1. Sansec found the newest domain in CMS blocks of 83 stores after it was registered Oct. 6, 2026, The Hacker News said1. That domain is hosted behind Cloudflare and, Sansec said, answers script requests only from visitors of infected stores1.
The Hacker News said two loader versions were observed. One stores a payload in the browser's localStorage so it can run again even if the external domain is later unavailable1. A later version adds browser-fingerprinting checks meant to filter bots and scanners1. The nature of the final payload remains unknown in the assigned reporting1.
Earlier iterations used Keitaro, an advertising tracker, as a traffic-distribution system to return a payload, a redirect or nothing, The Hacker News reported1. Sansec said a request to additionalver.com as a Windows desktop visitor returned a no-op cookie-setting response; deepveindrilling.com dropped the Keitaro stage and put bot filtering in the loader1.
On initial access, Sansec estimated 471 Magento stores were injected through the PolyShell vulnerability (CVE-2026-48356)1. The Hacker News cited one Magento 2.4.7-p1 store that still lacked Adobe's APSB26-73 PolyShell fix and had webshells disguised as PNG images beside the loader1. In another case, a Magento 2.4.7-p10 store with no missing core patches was compromised by adding a rogue administrator account used to inject the code1.
Sansec advised merchants to audit accounts and unexpected CMS blocks in cms_block and cms_page tables, apply updates and use strong passwords, according to The Hacker News1. Adobe's comment on the latest Sansec findings was not included in the article1.
