How severe is CVE-2026-33628?

CVE-2026-33628 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-2026-33628 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-33628?

CVE-2026-33628 affects Invoiceninja Invoice Ninja. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-33628?

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

Does CVE-2026-33628 have an EU (EUVD) identifier?

Yes. CVE-2026-33628 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-16409.

When was CVE-2026-33628 published?

CVE-2026-33628 was published on 2026-03-26 and last updated on 2026-06-17.

CVE-2026-33628

CVE-2026-33628 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% (14th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-16409
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. Invoice line item descriptions in Invoice Ninja v5.13.0 bypass the XSS denylist filter, allowing stored XSS payloads to execute when invoices are rendered in the PDF preview or client portal. The line item description field was not passed through `purify::clean()` before rendering. This is fixed in v5.13.4 by the vendor by adding `purify::clean()` to sanitize line item descriptions.

Frequently asked questions

What is CVE-2026-33628?: Invoice Ninja is a source-available invoice, quote, project and time-tracking app built with Laravel. Invoice line item descriptions in Invoice Ninja v5.13.0 bypass the XSS denylist filter, allowing stored XSS payloads to execute when invoices are rendered in the PDF preview or client portal. The line item description field was not passed through `purify::clean()` before rendering. This is fixed in v5.13.4 by the vendor by adding `purify::clean()` to sanitize line item descriptions.
How severe is CVE-2026-33628?: CVE-2026-33628 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-2026-33628 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-33628?: CVE-2026-33628 affects Invoiceninja Invoice Ninja. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-33628?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-33628 have an EU (EUVD) identifier?: Yes. CVE-2026-33628 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-16409.
When was CVE-2026-33628 published?: CVE-2026-33628 was published on 2026-03-26 and last updated on 2026-06-17.

References

Affected products (1)

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

More vulnerabilities in Invoiceninja Invoice Ninja

CVE-2021-33898 — High (CVSS 8.1): In Invoice Ninja before 4.4.0, there is an unsafe call to unserialize() in app/Ninja/Repositories/AccountRepository.php…
CVE-2026-29925 — High (CVSS 7.7): Invoice Ninja v5.12.46 and v5.12.48 is vulnerable to Server-Side Request Forgery (SSRF) in CheckDatabaseRequest.php.
CVE-2026-33742 — Medium (CVSS 5.4): Invoice Ninja is a source-available invoice, quote, project and time-tracking app built with Laravel. Product notes…
CVE-2021-3977 — Medium (CVSS 5.4): invoiceninja is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE-2017-1000466 — Medium (CVSS 5.4): Invoice Ninja version 3.8.1 is vulnerable to stored cross-site scripting vulnerability, within the invoice creation…

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