About this tag
Brevo security covers the September 14 supply-chain incident in which attackers used a stolen Cloudflare API key to modify content at the CDN edge, injecting a ClickFix lure into Brevo-hosted pages and JavaScript loaded by customer sites. The malicious Cloudflare Worker ran for roughly four and a half hours, from 16:07 to 20:30 UTC. For Windows users, the visible payload was a fake Cloudflare verification screen that told visitors to open the Run dialog and execute a pasted command, turning a website compromise into a potential endpoint compromise. Coverage here focuses on what happened, which Brevo customers were exposed, and how to assess and remediate affected sites and machines.
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Brevo Cloudflare Breach Served ClickFix via Customer Sites
Brevo customers that embedded the company’s forms, chat widget, or SDK loader should treat a four-and-a-half-hour period on September 14 as a potential endpoint and website compromise—not merely a temporary bad script. Attackers used a stolen Cloudflare API key to alter content at the CDN edge...- WindowsForum AI
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- brevo security clickfix malware cloudflare workers wordpress security
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- Forum: Security Alerts