CVE-2021-29251: Btcpayserver Btcpay Server

Medium severity, CVSS 6.5. EPSS: 0.8% chance of exploitation in the next 30 days.

BTCPay Server before 1.0.7.1 mishandles the policy setting in which users can register (in Server Settings > Policies). This affects Docker use cases in which a mail server is configured.

Affected products

• Btcpayserver Btcpay Server: before 1.0.7.1 (fixed in 1.0.7.1)

Published 2021-04-01. Last modified 2026-06-17.