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

> Attackers can trick admins into creating malicious invoice fields via CSRF due to missing nonce checks in the WooCommerce PDF Invoice Builder plugin.

- **Severity:** Medium 4.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 31 Aug 2023
- **Updated:** 8 Apr 2026
- **Also known as:** GHSA-pg2j-28wx-p6jw

## What is CVE-2023-4161?

CVE-2023-4161 is a medium-severity vulnerability in edgarrojas PDF Builder for WooCommerce. Create invoices,packing slips and more, published on 31 Aug 2023. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official 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.

Weakness: CWE-352 (Cross-Site Request Forgery)

## Which versions are affected by CVE-2023-4161?

It affects 1 product.


Products: Rednao Woocommerce Pdf Invoice Builder.

## How do I fix CVE-2023-4161?

No fix has been published for CVE-2023-4161 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-4161 being exploited?

There is no known exploitation of CVE-2023-4161 in the wild and no public exploit code.

## Other vulnerabilities in edgarrojas PDF Builder for WooCommerce. Create invoices,packing slips and more

- [CVE-2023-3677](https://insights.sbomify.com/CVE-2023-3677/): WooCommerce PDF Invoice Builder <= 1.2.89 - Authenticated (Subscriber+) SQL Injection via Export (high 8.8)
- [CVE-2023-46076](https://insights.sbomify.com/CVE-2023-46076/): WordPress WooCommerce PDF Invoice Builder Plugin <= 1.2.102 is vulnerable to Cross Site Scripting (XSS) (high 7.1)
- [CVE-2023-51486](https://insights.sbomify.com/CVE-2023-51486/): Cross-site request forgery in WooCommerce PDF Invoice Builder (medium 5.4)
- [CVE-2023-4160](https://insights.sbomify.com/CVE-2023-4160/): WooCommerce PDF Invoice Builder <= 1.2.90 - Authenticated (Administrator+) Cross-Site Scripting (medium 4.4)
- [CVE-2023-3764](https://insights.sbomify.com/CVE-2023-3764/): WooCommerce PDF Invoice Builder <= 1.2.90 - Cross-Site Request Forgery via Save (medium 4.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-4161 and fix it if it is affected.

What it is: CVE-2023-4161 is a medium-severity vulnerability in edgarrojas PDF Builder for WooCommerce. Create invoices,packing slips and more, published on 31 Aug 2023. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2023-4161 in the wild and no public exploit code.

Affected product: edgarrojas PDF Builder for WooCommerce. Create invoices,packing slips and more. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2023-4161/ (Markdown: https://insights.sbomify.com/CVE-2023-4161/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-4161
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-4161
- OSV: https://osv.dev/vulnerability/CVE-2023-4161

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-4161/
Summaries are generated and may contain mistakes; the official description above is the record.