CVE-2021-29250: Btcpayserver Btcpay Server

Medium severity, CVSS 5.4. EPSS: 0.5% chance of exploitation in the next 30 days.

BTCPay Server through 1.0.7.0 suffers from a Stored Cross Site Scripting (XSS) vulnerability within the POS Add Products functionality. This enables cookie stealing.

Affected products

• Btcpayserver Btcpay Server: up to and including 1.0.7.0

Published 2021-05-05. Last modified 2026-06-17.