CVE-2026-33742CWE-79

Invoice Ninja has Stored XSS via Markdown HTML Injection in Product Notes

Medium · published March 26, 2026

CVSS v3.1
5.4
EPSS
0%
Percentile
15.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.4 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00248 · 15.2th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-03-26T20:50Z
EPSS history
Timeline
  • 26 MAR 20:50Z
    Invoice Ninja has Stored XSS via Markdown HTML Injection in Product Notes
    cvelistv5