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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Invoiceninja | Invoice Ninja | < 5.13.4 |
Related Weaknesses (CWE)
References
- https://github.com/invoiceninja/invoiceninja/releases/tag/v5.13.4Release Notes
- https://github.com/invoiceninja/invoiceninja/security/advisories/GHSA-xph7-9749-ExploitVendor Advisory
- https://github.com/invoiceninja/invoiceninja/security/advisories/GHSA-xph7-9749-ExploitVendor Advisory
FAQ
What is CVE-2026-33742?
CVE-2026-33742 is a vulnerability with a CVSS score of 5.4 (MEDIUM). 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 stor...
How severe is CVE-2026-33742?
CVE-2026-33742 has been rated MEDIUM with a CVSS base score of 5.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-33742?
Check the references section above for vendor advisories and patch information. Affected products include: Invoiceninja Invoice Ninja.