CVE-2026-33742
Invoice Ninja has Stored XSS via Markdown HTML Injection in Product Notes
CVSS Score
5.4
EPSS Score
0.0%
EPSS Percentile
8th
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.
| CWE | CWE-79 |
| Vendor | invoiceninja |
| Product | invoiceninja |
| Published | Mar 26, 2026 |
| Last Updated | Mar 27, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None
Affected Versions
invoiceninja / invoiceninja
< 5.13.4