What’s Vulnerable › Vulnerabilities

CVE-2021-3830: Cross-site Scripting (XSS) - Stored in btcpayserver/btcpayserver

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-09-26 · updated 2026-06-17
• Weakness: CWE-79

Description

btcpayserver is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Affected products

• btcpayserver/btcpayserver: through 1.2.3

References

• https://github.com/btcpayserver/btcpayserver/commit/fc4e47cec608cc3dba24b19d0145ac69320b975e
• https://huntr.dev/bounties/0fcdee5f-1f07-47ce-b650-ea8b4a7d35d8
• https://github.com/btcpayserver/btcpayserver/commit/fc4e47cec608cc3dba24b19d0145ac69320b975e
• https://huntr.dev/bounties/0fcdee5f-1f07-47ce-b650-ea8b4a7d35d8

Get alerted when CVE-2021-3830 or the next vulnerability affects your stack