How severe is CVE-2026-33742?

CVE-2026-33742 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-33742 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-33742?

CVE-2026-33742 affects Invoiceninja Invoice Ninja. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-33742?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-33742 have an EU (EUVD) identifier?

Yes. CVE-2026-33742 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-16418.

When was CVE-2026-33742 published?

CVE-2026-33742 was published on 2026-03-26 and last updated on 2026-06-17.

CVE-2026-33742

CVE-2026-33742 is a medium-severity vulnerability in Invoiceninja Invoice Ninja with a CVSS 3.x base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
EPSS exploit prediction: 0% (10th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-16418
Weakness: CWE-79
Affected product: Invoiceninja Invoice Ninja
Published: 2026-03-26
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-33742?: 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.
How severe is CVE-2026-33742?: CVE-2026-33742 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-33742 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-33742?: CVE-2026-33742 affects Invoiceninja Invoice Ninja. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-33742?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-33742 have an EU (EUVD) identifier?: Yes. CVE-2026-33742 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-16418.
When was CVE-2026-33742 published?: CVE-2026-33742 was published on 2026-03-26 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:invoiceninja:invoice_ninja:*:*:*:*:*:*:*:*

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