What is CVE-2023-0879?

CVE-2023-0879 is a medium-severity vulnerability in Btcpayserver Btcpay Server, classified under Cross-site Scripting. CVSS score: 6.3/10. Published 2023-02-17.

How severe is CVE-2023-0879?

Medium severity. CVSS v3 base score is 6.3 out of 10.

XSS in Btcpayserver Btcpay Server

CVE-2023-0879

Cross-site Scripting (XSS) - Stored in GitHub repository btcpayserver/btcpayserver prior to 1.7.12.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2023-02-17 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.005 (39.8th percentile), scored 2026-10-20.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 40th percentile — 39.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Btcpayserver Btcpay Server
Btcpayserver Btcpayserver/btcpayserver — versions unspecified

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

huntr.dev/bounties/9464e3c6-961d-4e23-8b3d-07cbb31de541 (Exploit, Patch)
github.com/btcpayserver/btcpayserver/pull/4635/commits/f2f3b245c4d8980d8e54e470… (Patch)

Frequently asked questions

What is CVE-2023-0879?: CVE-2023-0879 is a medium-severity vulnerability in Btcpayserver Btcpay Server, classified under Cross-site Scripting. CVSS score: 6.3/10. Published 2023-02-17.
How severe is CVE-2023-0879?: Medium severity. CVSS v3 base score is 6.3 out of 10.