CVE-2026-33742— Invoice Ninja has Stored XSS via Markdown HTML Injection in Product Notes
Quick assessment
Affected
invoiceninja invoiceninja
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Invoice Ninja是Invoice Ninja开源的一个具有发票、报价、项目和时间跟踪功能的应用程序。 Invoice Ninja 5.13.0版本存在跨站脚本漏洞，该漏洞源于产品备注字段通过Markdown渲染允许原始HTML，可能导致存储型跨站脚本攻击。
Possible ATT&CK Techniques 1 AI
T1059.007 · JavaScript
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I. Basic Information for CVE-2026-33742
Vulnerability Information
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Vulnerability Title
Invoice Ninja has Stored XSS via Markdown HTML Injection in Product Notes
Source: CVE Program / CVE List V5
Vulnerability Description
Invoice Ninja is a source-available invoice, quote, project and time-tracking app built with Laravel. Product notes fields in Invoice Ninja v5.13.0 allow raw HTML via Markdown rendering, enabling stored XSS. The Markdown parser output was not sanitized with `purify::clean()` before being included in invoice templates. This is fixed in v5.13.4 by the vendor by adding `purify::clean()` to sanitize Markdown output.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
Invoice Ninja 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Invoice Ninja是Invoice Ninja开源的一个具有发票、报价、项目和时间跟踪功能的应用程序。 Invoice Ninja 5.13.0版本存在跨站脚本漏洞，该漏洞源于产品备注字段通过Markdown渲染允许原始HTML，可能导致存储型跨站脚本攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| invoiceninja | invoiceninja | < 5.13.4 | - |
|
II. Public POCs for CVE-2026-33742
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Vendor Advisories for CVE-2026-33742 (1)
Vendor Pages for CVE-2026-33742 (1)
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Release v5.13.4 · invoiceninja/invoiceninja · GitHub x_refsource_MISC
IV. Related Vulnerabilities
Same product: invoiceninja
Same vendor: invoiceninja
Same weakness: CWE-79
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V. Comments for CVE-2026-33742
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