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Vulnerability record · CVE-2026-33742 · published 26 March 2026

CVE-2026-33742: Invoiceninja invoice ninja cross-site scripting vulnerability

Invoiceninja · Invoice Ninja

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.

5.4 CVSS 3.1 Medium EPSS 0.25% · top 85.6% CWE-79 · Cross-site scripting
5.4CVSS 3.1 base score
0.25%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
3References, 2 tagged exploit
17 Jun 2026Last modified by NVD

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:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/invoiceninja/invoiceninja/releases/tag/v5.13.4 Release Notes
https://github.com/invoiceninja/invoiceninja/security/advisories/GHSA-xph7-9749-56mh ExploitVendor Advisory
https://github.com/invoiceninja/invoiceninja/security/advisories/GHSA-xph7-9749-56mh ExploitVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.1CVE-2021-33898Invoiceninja invoice ninja deserialization of untrusted data vulnerabilityIn Invoice Ninja before 4.4.0, there is an unsafe call to unserialize() in app/Ninja/Repositories/AccountRepository.php that may allow an attacker to…EPSS 1.8%7.7CVE-2026-29925Invoiceninja invoice ninja server-side request forgery (ssrf) vulnerabilityInvoice Ninja v5.12.46 and v5.12.48 is vulnerable to Server-Side Request Forgery (SSRF) in CheckDatabaseRequest.php.EPSS 0.37%5.4CVE-2026-33628Invoiceninja invoice ninja cross-site scripting vulnerabilityInvoice Ninja is a source-available invoice, quote, project and time-tracking app built with Laravel. Invoice line item descriptions in Invoice Ninja…EPSS 0.30%5.4CVE-2021-3977Invoiceninja invoice ninja cross-site scripting vulnerabilityinvoiceninja is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')EPSS 0.59%5.4CVE-2017-1000466Invoiceninja invoice ninja cross-site scripting vulnerabilityInvoice Ninja version 3.8.1 is vulnerable to stored cross-site scripting vulnerability, within the invoice creation page, which can result in disrupt…EPSS 0.79%6.1CVE-2026-42897Microsoft Exchange Server XSS enables spoofingMicrosoft Exchange Server and Exchange Server Subscription Edition fail to neutralize input during web page generation, a cross-site scripting flaw (…KEVEPSS 0.52%analysed6.1CVE-2025-48700Zimbra Classic UI stored XSS via crafted email HTMLZimbra Collaboration Suite Classic UI fails to properly sanitize HTML content in email messages, allowing crafted tag structures and attribute values…KEVEPSS 1.7%analysed6.1CVE-2025-66376Zimbra Collaboration Classic UI stored XSS via CSS @import in emailZimbra Collaboration Suite 10 before 10.0.18 and 10.1 before 10.1.13 allows stored cross-site scripting in the Classic UI through CSS @import directi…KEVEPSS 20%analysed

Source: NIST National Vulnerability Database (record CVE-2026-33742), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.