CVE-2026-33742: Invoice Ninja is a source-available invoice, quote, project and time-tracking app built with Laravel

Q: How do I fix CVE-2026-33742?

invoice ninja: upgrade to 5.13.4. Exact commands for each OS are on this page.

Q: Is CVE-2026-33742 being exploited?

CVE-2026-33742 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-33742 affect?

CVE-2026-33742 affects invoice ninja. Severity is medium (CVSS 5.4). 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 n

Q: How urgent is CVE-2026-33742?

Priority 27/100. Public exploit reference

Routine

MEDIUM 5.4UPGRADE

CVE-2026-33742 is a medium-severity flaw (CVSS 5.4) affecting invoice ninja. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.2% (top 89%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-03-26
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: invoiceninja

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-26 21:17 UTCPublished CVE record published
2026-06-17 10:38 UTCUpdated Record last modified

invoiceninja invoice ninja UPGRADE

Affected: < 5.13.4

Fixed in: 5.13.4

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy invoice-ninja || rpm -q invoice-ninja || invoice-ninja --version

2. UPGRADE to 5.13.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade invoice-ninja

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade invoice-ninja

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-33742?

invoice ninja: upgrade to 5.13.4. Exact commands for each OS are on this page.

Is CVE-2026-33742 being exploited?

CVE-2026-33742 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-33742 affect?

CVE-2026-33742 affects invoice ninja. Severity is medium (CVSS 5.4). 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 n

How urgent is CVE-2026-33742?

Priority 27/100. Public exploit reference

Software pages

Laravel vulnerabilities

Related CVEs

CVE-2026-33628 MEDIUM 5.4 UPGRADE Invoice Ninja is a source-available invoice, quote, project and time-tracking app built with Laravel
CVE-2026-29925 HIGH 7.7 DOWNGRADE Invoice Ninja v5.12.46 and v5.12.48 is vulnerable to Server-Side Request Forgery (SSRF) in CheckDatabaseReques

References

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