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.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
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
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.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-9021 being exploited?
There is no known exploitation of CVE-2026-9021 in the wild and no public exploit code.
Sources
Also known as GHSA-q2rr-fm39-2rpw.