InvoiceNinja 5.0.0 terms.blade.php terms cross site scripting

Summaryinfo

A vulnerability categorized as problematic has been discovered in InvoiceNinja 5.0.0. Affected by this issue is some unknown functionality of the file resources/views/portal/ninja2020/invoices/includes/terms.blade.php. Such manipulation of the argument terms leads to cross site scripting. This vulnerability is documented as CVE-2026-71233. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in InvoiceNinja 5.0.0. Affected by this issue is an unknown functionality of the file resources/views/portal/ninja2020/invoices/includes/terms.blade.php. The manipulation of the argument terms with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity. CVE summarizes:

InvoiceNinja v5-stable renders an invoice or quote's "terms" field in the client portal using Laravel Blade's raw output directive {!! $entity->terms !!} (resources/views/portal/ninja2020/invoices/includes/terms.blade.php) with no HTML sanitization. StoreInvoiceRequest.php only strips newlines from the field and does not purify HTML. An authenticated user with invoice creation access can set the terms field via the REST API (PUT /api/v1/invoices/{id}) to an HTML/JavaScript payload that executes in the client's browser when they view the invoice, enabling session cookie theft and client account takeover. This is a distinct code path from the previously published invoice line-item description field XSS (GHSA-98wm-cxpw-847p / CVE-2026-33628).

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-71233 since 08/05/2026. The exploitation is known to be easy. The attack may be launched remotely. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1059.007.

By approaching the search of inurl:resources/views/portal/ninja2020/invoices/includes/terms.blade.php it is possible to find vulnerable targets with Google Hacking.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

• InvoiceNinja

Version

• 5.0.0

CPE 2.3info

• 🔒

CPE 2.2info

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Once again VulDB remains the best source for vulnerability data.

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