Medium 5.4Published Mar 26, 2026

CVE-2026-33742Invoice Ninja has Stored XSS via Markdown HTML Injection in Product Notes

Updated under an hour ago (Oct 27, 2026, 9:50 AM ET)

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It affects invoiceninja and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for invoiceninja

Exploited in the last 30 days

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.

CVSS: 5.4 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Weakness (CWE): CWE-79
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Mar 27, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

invoiceninja invoiceninja invoiceninja:invoiceninja (from the name)	before 5.13.4	CNA record
invoiceninja invoice_ninja invoiceninja:invoice_ninja	before 5.13.4	NVD

References

References

https://github.com/invoiceninja/invoiceninja/security/advisories/GHSA-xph7-9749-56mh	x-refsource-confirm, exploit, vendor-advisory
https://github.com/invoiceninja/invoiceninja/releases/tag/v5.13.4	x-refsource-misc, release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.