CVE-2026-9021 json
Easy Invoice <= 2.1.19 - Unauthenticated Arbitrary Quote Accept/Decline and Invoice Creation via easy_invoice_accept_quote / easy_invoice_decline_quote AJAX Actions
published 2026-07-09 4 mo ago modified 2026-07-09 4 mo ago also EUVD-2026-42567
- cvss
- 5.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 44%
- public exploits
- 0
- none known
Summary
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.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 4 mo ago
Exploit prediction
0.52% chance of exploitation in the next 30 days, higher than 44% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
Affected products
- matrixaddons Easy Invoice – Invoice Generator, PDF Quotes & Payments
Classification
- Weakness
-
- CWE-862 Missing Authorization
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/dab1c93d-e83c-4d38-be80-56d8e32f1894?source=cve
- plugins.trac.wordpress.org /browser/easy-invoice/tags/2.2.0/includes/Controllers/QuoteController.php#L1022
- plugins.trac.wordpress.org /browser/easy-invoice/tags/2.2.0/includes/Controllers/QuoteController.php#L1453
- plugins.trac.wordpress.org /browser/easy-invoice/tags/2.2.0/includes/Controllers/QuoteController.php#L88
- plugins.trac.wordpress.org /browser/easy-invoice/tags/2.2.0/templates/quotes/single.php#L1462
- plugins.trac.wordpress.org /browser/easy-invoice/tags/2.1.12/includes/Controllers/QuoteController.php#L1022
- plugins.trac.wordpress.org /browser/easy-invoice/tags/2.1.12/includes/Controllers/QuoteController.php#L1453
- plugins.trac.wordpress.org /browser/easy-invoice/tags/2.1.12/includes/Controllers/QuoteController.php#L88
- plugins.trac.wordpress.org /browser/easy-invoice/tags/2.1.12/templates/quotes/single.php#L1462
- plugins.trac.wordpress.org /changeset/3517910/easy-invoice/trunk/includes/Controllers/QuoteController.php
Sources
- CVE List CVE-2026-9021
- NVD CVE-2026-9021
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.