CVE-2026-9021 Easy Invoice <= 2.1.19 - Unauthenticated Arbitrary Quote Accept/Decline and Invoice Creation via easy_invoice_accept_quote / easy_invoice_decline_quote AJAX Actions

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 easyinvoiceacceptquote and easyinvoicedeclinequote AJAX actions via wpajaxnopriv hooks and relying solely on a quote-scoped nonce that i...