by Source Defense A recent incident at Blue Shield of California highlights the critical importance of client-side security controls when implementing third-party scripts on healthcare websites. The nonprofit health plan has disclosed a significant data breach affecting 4.7 million members, stemming from a misconfiguration of Google Analytics on their web properties between April 2021 and…
Category: SRI
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CSP FY: A Magecart Attack That Dodges Policy—and Makes a Joke While Doing It
by Source Defense When attackers are clever enough to name their cookie “csp_f_y,” you know they’re not just exfiltrating data—they’re mocking your defenses. In a recent attack spotted by the Source Defense Cyber Research team, a compromised first-party script on a payment page stored sensitive data in a cookie named csp_f_y. The exfiltration didn’t happen…