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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

Quick assessment

Affected
matrixaddons Easy Invoice – Invoice Generator, PDF Quotes & Payments
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress Easy Invoice是WordPress基金会的一款功能全面的 WordPress 发票插件。 WordPress Easy Invoice 2.1.19及之前版本存在授权问题漏洞，该漏洞源于授权缺失问题，导致未经验证的攻击者可通过从公共报价页面获取每个报价的nonce并提交到admin-ajax，从而接受或拒绝任意已发布的报价，并根据配置的接受操作自动将其转换为发票。

CVSS 5.3 · Medium EPSS 0.52% · P43

Affected Version Matrix 1

VendorProduct Version RangeStatus
matrixaddons Easy Invoice – Invoice Generator, PDF Quotes & Payments ≤ 2.2.19 affected
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I. Basic Information for CVE-2026-9021

Vulnerability Information
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Vulnerability Title
Easy Invoice <= 2.1.19 - Unauthenticated Arbitrary Quote Accept/Decline and Invoice Creation via easy_invoice_accept_quote / easy_invoice_decline_quote AJAX Actions
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
WordPress Easy Invoice 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress Easy Invoice是WordPress基金会的一款功能全面的 WordPress 发票插件。 WordPress Easy Invoice 2.1.19及之前版本存在授权问题漏洞，该漏洞源于授权缺失问题，导致未经验证的攻击者可通过从公共报价页面获取每个报价的nonce并提交到admin-ajax，从而接受或拒绝任意已发布的报价，并根据配置的接受操作自动将其转换为发票。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
matrixaddons Easy Invoice – Invoice Generator, PDF Quotes & Payments 0 ~ 2.2.19 -

II. Public POCs for CVE-2026-9021

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III. Intelligence Information for CVE-2026-9021

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Patches & Fixes for CVE-2026-9021 (1)

Vendor Advisories for CVE-2026-9021 (1)

IV. Related Vulnerabilities

Same vendor: matrixaddons
Same weakness: CWE-862