# CVE-2026-9021: Missing authorization in Easy Invoice – Invoice Generator, PDF Quotes & Payments

> Unauthenticated attackers can accept or decline arbitrary quotes and create invoices by exploiting missing authorization checks in the Easy Invoice WordPress plugin.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/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:** Not needed
- **Fix available:** No
- **Published:** 9 Jul 2026
- **Updated:** 9 Jul 2026
- **Also known as:** GHSA-q2rr-fm39-2rpw

## What is CVE-2026-9021?

CVE-2026-9021 is a medium-severity missing authorization vulnerability in matrixaddons Easy Invoice – Invoice Generator, PDF Quotes & Payments, published on 9 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The Easy Invoice plugin for WordPress is vulnerable to Missing Authorization in versions up to, and including, 2.1.19. This is due to the plugin registering the easy_invoice_accept_quote and easy_invoice_decline_quote AJAX actions via wp_ajax_nopriv_ hooks and relying solely on a quote-scoped nonce that is rendered into the publicly accessible single quote template, combined with an ownership check that is gated behind an off-by-default Pro option (easy_invoice_pro_restrict_quote_to_client). This makes it possible for unauthenticated attackers to accept or decline arbitrary published quotes — and, depending on the configured accept action, automatically convert them into invoices (and even email them to the client) — by harvesting the per-quote nonce from the public quote page and submitting it to admin-ajax.

Weakness: CWE-862 (Missing Authorization)

## Which versions are affected by CVE-2026-9021?


## How do I fix CVE-2026-9021?

No fix has been published for CVE-2026-9021 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-9021 being exploited?

There is no known exploitation of CVE-2026-9021 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-9021 and fix it if it is affected.

What it is: CVE-2026-9021 is a medium-severity missing authorization vulnerability in matrixaddons Easy Invoice – Invoice Generator, PDF Quotes & Payments, published on 9 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-9021 in the wild and no public exploit code.

Affected product: matrixaddons Easy Invoice – Invoice Generator, PDF Quotes & Payments. 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-2026-9021/ (Markdown: https://insights.sbomify.com/CVE-2026-9021/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-9021
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-9021
- OSV: https://osv.dev/vulnerability/CVE-2026-9021

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-9021/
Summaries are generated and may contain mistakes; the official description above is the record.