🛡️ CVE-2026-9021

🟡 CVSS 5.3 — Medium ✅ No Known Exploit CWE-862 NVD
5.3
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity low, availability none.

Weakness class

CVE-2026-9021 is classified as CWE-862: Missing Authorization. No authorisation check is performed before carrying out a restricted action.

Affected software

CVE-2026-9021 is recorded against 1 package.

  • unknown

Timeline and source

Published on 9 July 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

plugins.trac.wordpress.org
plugins.trac.wordpress.org
plugins.trac.wordpress.org
plugins.trac.wordpress.org
plugins.trac.wordpress.org
plugins.trac.wordpress.org
plugins.trac.wordpress.org
plugins.trac.wordpress.org
plugins.trac.wordpress.org
www.wordfence.com

Details

Severity MEDIUM
CVSS Score 5.3
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CWE CWE-862
Public Exploit ✅ No
Source NVD
Published 2026-07-09
Updated 2026-08-11
Modified 2026-07-09
Fix URL N/A

Affected Packages

Software From version Fixed in
unknown — —

References

Similar Threats

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