CVE-2023-0879Public exploitNetwork attack vector

Stored script execution via unchecked logo uploads

Published Feb 17, 2023 · Updated Mar 18, 2025

Stored XSS in BTCPay Server before 1.7.12 allows attackers to execute script in another user's browser through a crafted logo upload. Logo upload handlers trusted client-supplied image MIME types and stored content without verifying its file signature or extension. Access to a server or store logo setting and subsequent loading by another user are required, exposing browser-accessible data and actions in that user's session.

CVSS severity6.3
Medium
EPSS probability0.48%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in BTCPay Server before 1.7.12 allows attackers to execute script in another user's browser through a crafted logo upload. Logo upload handlers trusted client-supplied image MIME types and stored content without verifying its file signature or extension. Access to a server or store logo setting and subsequent loading by another user are required, exposing browser-accessible data and actions in that user's session.

The record

CVE
CVE-2023-0879
Published
Feb 17, 2023
Updated
Mar 18, 2025
Vendor
BTCPay Server
Product
BTCPay Server
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Feb 17, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 18, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <1.7.12

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

BTCPay Server · BTCPay Serverversion=unspecified <1.7.12

Published CVSS scores

6.3huntr.devCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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