BTCPay Server flags active exploit; users urged to update to v2.4.2 or shut down servers

BTCPay Server's urgent notice of an active exploit and guidance to update to v2.4.2 or shut down introduces immediate operational and counterparty risk for merchants and self-hosted payment infrastructure. Even if core protocols are unaffected, incidents like this typically tighten risk appetite, raise security-driven friction for payment flows, and can temporarily pressure broader crypto sentiment as participants reassess exposure to ecosystem vulnerabilities.