CVE-2026-9021

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreHIGH confidence

Score 5.3 from GitHub Security Advisory published 2026-07-09. a secondary CVSS source baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.3Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
5.3
EG Score
5.3(high)
EG Risk
24(Track)
EG Risk 24/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity53% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
22%
KEV
Not listed

Published

July 9, 2026

Last Modified

July 9, 2026

References (10)

Vendor Advisories for CVE-2026-9021(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 19× in last 7d / 53× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-08-03 10:36 UTCEPSS rescore
  2. 2026-08-03 02:17 UTCGHSA enrichment
  3. 2026-08-02 03:49 UTCEG score recompute
  4. 2026-08-02 03:49 UTCGHSA enrichment
  5. 2026-08-02 02:27 UTCEPSS rescore
  6. 2026-08-01 05:20 UTCEG score recompute
  7. 2026-08-01 05:20 UTCGHSA enrichment
  8. 2026-08-01 04:16 UTCEPSS rescore
  9. 2026-07-31 06:52 UTCEG score recompute
  10. 2026-07-31 06:52 UTCGHSA enrichment
  11. 2026-07-30 16:28 UTCEPSS rescore
  12. 2026-07-30 08:21 UTCEG score recompute
  13. 2026-07-30 08:21 UTCGHSA enrichment
  14. 2026-07-30 01:30 UTCEPSS rescore
  15. 2026-07-29 08:04 UTCEG score recompute
  16. 2026-07-29 08:03 UTCGHSA enrichment
  17. 2026-07-28 15:37 UTCEPSS rescore
  18. 2026-07-28 09:21 UTCEG score recompute
  19. 2026-07-28 09:21 UTCGHSA enrichment
  20. 2026-07-27 14:14 UTCEPSS rescore
  21. 2026-07-27 10:51 UTCEG score recompute
  22. 2026-07-27 10:51 UTCGHSA enrichment
  23. 2026-07-26 14:54 UTCEPSS rescore
  24. 2026-07-26 12:21 UTCEG score recompute
  25. 2026-07-26 12:21 UTCGHSA enrichment
Show 28 more
  1. 2026-07-25 14:18 UTCEPSS rescore
  2. 2026-07-24 14:18 UTCEPSS rescore
  3. 2026-07-23 14:18 UTCEPSS rescore
  4. 2026-07-23 03:23 UTCEG score recompute
  5. 2026-07-22 14:08 UTCEPSS rescore
  6. 2026-07-21 15:25 UTCEPSS rescore
  7. 2026-07-21 15:25 UTCEPSS rescore
  8. 2026-07-20 17:08 UTCEPSS rescore
  9. 2026-07-19 14:31 UTCEPSS rescore
  10. 2026-07-19 02:29 UTCEPSS rescore
  11. 2026-07-18 10:04 UTCEPSS rescore
  12. 2026-07-16 22:33 UTCGHSA enrichment
  13. 2026-07-16 17:03 UTCEPSS rescore
  14. 2026-07-16 00:05 UTCGHSA enrichment
  15. 2026-07-15 16:57 UTCEPSS rescore
  16. 2026-07-15 02:00 UTCEPSS rescore
  17. 2026-07-15 01:36 UTCGHSA enrichment
  18. 2026-07-14 03:07 UTCGHSA enrichment
  19. 2026-07-13 22:31 UTCEPSS rescore
  20. 2026-07-13 06:13 UTCEPSS rescore
  21. 2026-07-13 04:39 UTCGHSA enrichment
  22. 2026-07-12 06:10 UTCGHSA enrichment
  23. 2026-07-12 05:46 UTCEPSS rescore
  24. 2026-07-11 08:27 UTCEPSS rescore
  25. 2026-07-11 07:37 UTCGHSA enrichment
  26. 2026-07-10 09:07 UTCGHSA enrichment
  27. 2026-07-09 10:38 UTCEG score recompute
  28. 2026-07-09 10:35 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-9021?
CVE-2026-9021 is a medium vulnerability published on July 9, 2026. 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 is…
When was CVE-2026-9021 disclosed?
CVE-2026-9021 was first published in the National Vulnerability Database on July 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-9021 actively exploited?
CVE-2026-9021 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 78.0% of all scored CVEs.
What is the CVSS score of CVE-2026-9021?
CVE-2026-9021 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-9021?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-9021, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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