CVE-2021-3830
Cross-site Scripting (XSS) - Stored in btcpayserver/btcpayserver
MEDIUM
5.4
CVSS Score
Published: September 26, 2021 at 08:15 AM UTC
Updated: June 17, 2026 at 04:05 AM UTC
1 product affected across 1 vendorBtcpayserver
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Severity
MEDIUM5.4
Exploit prediction
EPSS 0.6%
Description
btcpayserver is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v ≤ 1.2.3v < 1.2.3
Affected range stops below 1.2.3, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
References (2)
x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/btcpayserver/btcpayserver/commit/fc4e47cec608cc3dba24b19d0145ac69320b975ex_refsource_CONFIRMExploitIssue TrackingPatchThird Party Advisory
Source: [email protected]
https://huntr.dev/bounties/0fcdee5f-1f07-47ce-b650-ea8b4a7d35d8CVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- LOW
- User Interaction
- REQUIRED
- Scope
- CHANGED
- Confidentiality
- LOW
- Integrity
- LOW
- Availability
- NONE
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-79
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