CVE-2023-4666

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2023-10-16. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 3%CVSS: 9.8Exploit: NoneExposed: 0

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

The Form Maker by 10Web WordPress plugin before 1.15.20 does not validate signatures when creating them on the server from user input, allowing unauthenticated users to create arbitrary files and lead to RCE

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
75(Attend)
EG Risk 75/100SSVC: Attend

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
Severity98% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS
87.1%
KEV
Not listed

Published

October 16, 2023

Last Modified

June 17, 2026

Advisory Details (1)

Auto-updated Jun 21, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

Form-Maker < 1.15.20 – Unauthenticated Arbitrary File Upload | CVE 2023-4666 | Plugin Vulnerabilities

https://wpscan.com/vulnerability/c6597e36-02d6-46b4-89db-52c160f418be

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 42× 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. 2026-07-24 14:16 UTCEPSS rescore
  2. 2026-07-24 14:16 UTCEPSS rescore
  3. 2026-07-23 14:16 UTCEPSS rescore
  4. 2026-07-23 02:27 UTCEG score recompute
  5. 2026-07-22 23:14 UTCEG score recompute
  6. 2026-07-22 14:06 UTCEPSS rescore
  7. 2026-07-21 15:23 UTCEPSS rescore
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  9. 2026-07-20 17:06 UTCEPSS rescore
  10. 2026-07-19 14:29 UTCEPSS rescore
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  12. 2026-07-19 02:27 UTCEPSS rescore
  13. 2026-07-18 10:03 UTCEPSS rescore
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  15. 2026-07-16 17:01 UTCEPSS rescore
  16. 2026-07-15 16:56 UTCEPSS rescore
  17. 2026-07-15 16:56 UTCEPSS rescore
  18. 2026-07-15 01:59 UTCEPSS rescore
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  20. 2026-07-13 22:28 UTCEPSS rescore
  21. 2026-07-13 22:28 UTCEPSS rescore
  22. 2026-07-12 05:45 UTCEPSS rescore
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  24. 2026-07-09 19:08 UTCEPSS rescore
  25. 2026-07-08 15:13 UTCEPSS rescore
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  1. 2026-07-07 13:44 UTCEPSS rescore
  2. 2026-07-07 13:44 UTCEPSS rescore
  3. 2026-07-06 16:26 UTCEPSS rescore
  4. 2026-07-06 16:26 UTCEPSS rescore
  5. 2026-07-06 02:22 UTCEPSS rescore
  6. 2026-07-05 02:29 UTCEPSS rescore
  7. 2026-07-04 06:29 UTCEPSS rescore
  8. 2026-07-04 06:29 UTCEPSS rescore
  9. 2026-07-02 16:59 UTCEPSS rescore
  10. 2026-07-01 15:05 UTCEPSS rescore
  11. 2026-06-30 23:21 UTCEPSS rescore
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  13. 2026-06-29 14:05 UTCEPSS rescore
  14. 2026-06-28 04:55 UTCEPSS rescore
  15. 2026-06-27 03:07 UTCEPSS rescore
  16. 2026-06-25 13:48 UTCEPSS rescore
  17. 2026-06-25 13:48 UTCEPSS rescore
  18. 2026-06-24 14:04 UTCEPSS rescore
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  20. 2026-06-23 21:31 UTCEPSS rescore
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  22. 2026-06-22 14:24 UTCEPSS rescore
  23. 2026-06-22 14:24 UTCEPSS rescore
  24. 2026-06-21 01:58 UTCEPSS rescore
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  26. 2026-06-19 19:24 UTCEPSS rescore
  27. 2026-06-19 19:24 UTCEPSS rescore
  28. 2026-06-18 17:51 UTCEPSS rescore
  29. 2026-06-17 17:51 UTCEPSS rescore
  30. 2026-06-16 17:51 UTCEPSS rescore
  31. 2026-06-16 17:51 UTCEPSS rescore
  32. 2026-06-15 17:47 UTCEPSS rescore
  33. 2026-06-14 23:16 UTCEPSS rescore
  34. 2026-06-13 22:59 UTCEPSS rescore
  35. 2026-06-13 22:59 UTCEPSS rescore
  36. 2026-06-12 23:11 UTCEPSS rescore
  37. 2026-06-12 23:10 UTCEPSS rescore
  38. 2026-06-11 13:59 UTCEPSS rescore
  39. 2026-06-10 22:17 UTCEPSS rescore
  40. 2026-06-10 13:21 UTCEPSS rescore
  41. 2026-06-08 14:16 UTCEPSS rescore
  42. 2026-06-08 14:16 UTCEPSS rescore
  43. 2026-06-07 15:24 UTCEPSS rescore
  44. 2026-06-07 15:23 UTCEPSS rescore
  45. 2026-06-06 13:46 UTCEPSS rescore
  46. 2026-06-06 13:46 UTCEPSS rescore
  47. 2026-06-05 22:46 UTCEPSS rescore
  48. 2026-06-05 22:46 UTCEPSS rescore
  49. 2026-06-05 06:09 UTCEPSS rescore
  50. 2026-06-05 06:09 UTCEPSS rescore
  51. 2026-06-05 06:09 UTCEPSS rescore
  52. 2026-06-02 20:12 UTCEPSS rescore
  53. 2026-06-02 20:12 UTCEPSS rescore
  54. 2026-06-01 13:51 UTCEPSS rescore
  55. 2026-06-01 13:51 UTCEPSS rescore
  56. 2026-05-31 00:15 UTCEPSS rescore
  57. 2026-05-31 00:15 UTCEPSS rescore
  58. 2026-05-29 13:43 UTCEPSS rescore
  59. 2026-05-28 13:44 UTCEPSS rescore
  60. 2026-05-27 13:39 UTCEPSS rescore
  61. 2026-05-27 13:39 UTCEPSS rescore
  62. 2026-05-26 07:18 UTCEPSS rescore
  63. 2026-05-26 07:18 UTCEPSS rescore
  64. 2026-05-26 07:18 UTCEPSS rescore
  65. 2026-05-24 15:45 UTCEG score recompute
  66. 2026-05-24 15:45 UTCGHSA enrichment

Publicly available exploits

(1 reference)

Working exploit code is in the public domain. Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Nucleihttp/cves/2023/CVE-2023-4666.yaml
    First seen Jan 1, 2023

    Form-Maker < 1.15.20 - Unauthenticated Arbitrary File Upload

    Open source ↗

Frequently asked(5)

What is CVE-2023-4666?
CVE-2023-4666 is a critical vulnerability published on October 16, 2023. The Form Maker by 10Web WordPress plugin before 1.15.20 does not validate signatures when creating them on the server from user input, allowing unauthenticated users to create arbitrary files and lead to RCE
When was CVE-2023-4666 disclosed?
CVE-2023-4666 was first published in the National Vulnerability Database on October 16, 2023, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-4666 actively exploited?
CVE-2023-4666 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 87.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2023-4666?
CVE-2023-4666 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2023-4666?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-4666, 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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