CVE-2023-38203

CRITICALNVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score elevated to 9.8 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2024-01-08), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 9.8 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 4 sources updated this weekExploited in the wild
9.8EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 97%CVSS: 9.8Exploit: cisa kev · ssvc active · kev ransomware · epss top5pct · epss high · public exploitExposed: 0

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

Adobe ColdFusion versions 2018u17 (and earlier), 2021u7 (and earlier) and 2023u1 (and earlier) are affected by a Deserialization of Untrusted Data vulnerability that could result in Arbitrary code execution. Exploitation of this issue does not require user interaction.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
99(Act)
EG Risk 99/100SSVC: Act

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%
Exploitation100% × 40%
Automatability100% × 15%
Action: Fix now — active exploitation, automatable, high impact.
EPSS PROB
97%
EPSS %ILE
100%
KEV
⚠ Exploited

Published

July 20, 2023

Last Modified

October 23, 2025

Advisory Details (1)

Auto-updated Sep 3, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: cisa.
cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-38203

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 45× in last 7d / 197× 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.

Showing the most recent 100 of 642 total refreshes for this CVE.

  1. 2026-09-08 15:33 UTCGHSA enrichment
  2. 2026-09-08 11:13 UTCGHSA enrichment
  3. 2026-09-08 06:53 UTCGHSA enrichment
  4. 2026-09-08 02:33 UTCGHSA enrichment
  5. 2026-09-07 22:14 UTCGHSA enrichment
  6. 2026-09-07 17:53 UTCGHSA enrichment
  7. 2026-09-07 13:33 UTCGHSA enrichment
  8. 2026-09-07 09:12 UTCGHSA enrichment
  9. 2026-09-07 04:50 UTCGHSA enrichment
  10. 2026-09-07 00:31 UTCGHSA enrichment
  11. 2026-09-06 20:12 UTCGHSA enrichment
  12. 2026-09-06 15:53 UTCEG score recompute
  13. 2026-09-06 15:53 UTCGHSA enrichment
  14. 2026-09-06 13:45 UTCEPSS rescore
  15. 2026-09-06 11:33 UTCGHSA enrichment
  16. 2026-09-06 07:14 UTCGHSA enrichment
  17. 2026-09-06 02:55 UTCGHSA enrichment
  18. 2026-09-05 22:35 UTCGHSA enrichment
  19. 2026-09-05 18:16 UTCEG score recompute
  20. 2026-09-05 18:16 UTCGHSA enrichment
  21. 2026-09-05 15:26 UTCEPSS rescore
  22. 2026-09-05 13:57 UTCGHSA enrichment
  23. 2026-09-05 09:38 UTCGHSA enrichment
  24. 2026-09-05 05:18 UTCGHSA enrichment
  25. 2026-09-05 00:57 UTCGHSA enrichment
Show 75 more
  1. 2026-09-04 20:35 UTCGHSA enrichment
  2. 2026-09-04 17:38 UTCCISA KEV update
  3. 2026-09-04 16:12 UTCGHSA enrichment
  4. 2026-09-04 11:53 UTCGHSA enrichment
  5. 2026-09-04 07:33 UTCGHSA enrichment
  6. 2026-09-04 03:13 UTCGHSA enrichment
  7. 2026-09-03 22:54 UTCGHSA enrichment
  8. 2026-09-03 18:34 UTCGHSA enrichment
  9. 2026-09-03 14:13 UTCGHSA enrichment
  10. 2026-09-03 09:53 UTCGHSA enrichment
  11. 2026-09-03 05:33 UTCGHSA enrichment
  12. 2026-09-03 01:14 UTCGHSA enrichment
  13. 2026-09-02 20:54 UTCGHSA enrichment
  14. 2026-09-02 17:33 UTCCISA KEV update
  15. 2026-09-02 16:34 UTCGHSA enrichment
  16. 2026-09-02 12:12 UTCGHSA enrichment
  17. 2026-09-02 07:53 UTCGHSA enrichment
  18. 2026-09-02 03:34 UTCGHSA enrichment
  19. 2026-09-01 23:13 UTCGHSA enrichment
  20. 2026-09-01 18:53 UTCGHSA enrichment
  21. 2026-09-01 14:33 UTCGHSA enrichment
  22. 2026-09-01 10:13 UTCGHSA enrichment
  23. 2026-09-01 05:51 UTCGHSA enrichment
  24. 2026-09-01 01:31 UTCGHSA enrichment
  25. 2026-08-31 21:11 UTCGHSA enrichment
  26. 2026-08-31 16:52 UTCGHSA enrichment
  27. 2026-08-31 14:19 UTCCISA KEV update
  28. 2026-08-31 12:31 UTCGHSA enrichment
  29. 2026-08-31 08:11 UTCGHSA enrichment
  30. 2026-08-31 03:47 UTCGHSA enrichment
  31. 2026-08-30 23:28 UTCEG score recompute
  32. 2026-08-30 23:28 UTCGHSA enrichment
  33. 2026-08-30 19:15 UTCEPSS rescore
  34. 2026-08-30 19:09 UTCGHSA enrichment
  35. 2026-08-30 14:49 UTCGHSA enrichment
  36. 2026-08-30 10:30 UTCGHSA enrichment
  37. 2026-08-30 06:10 UTCGHSA enrichment
  38. 2026-08-30 01:51 UTCGHSA enrichment
  39. 2026-08-29 21:32 UTCGHSA enrichment
  40. 2026-08-29 17:12 UTCGHSA enrichment
  41. 2026-08-29 12:50 UTCGHSA enrichment
  42. 2026-08-29 08:30 UTCGHSA enrichment
  43. 2026-08-29 04:08 UTCGHSA enrichment
  44. 2026-08-28 23:49 UTCEG score recompute
  45. 2026-08-28 23:48 UTCGHSA enrichment
  46. 2026-08-28 21:38 UTCEPSS rescore
  47. 2026-08-28 19:26 UTCGHSA enrichment
  48. 2026-08-28 15:06 UTCGHSA enrichment
  49. 2026-08-28 10:46 UTCGHSA enrichment
  50. 2026-08-28 06:25 UTCGHSA enrichment
  51. 2026-08-28 02:06 UTCGHSA enrichment
  52. 2026-08-27 21:46 UTCGHSA enrichment
  53. 2026-08-27 17:26 UTCGHSA enrichment
  54. 2026-08-27 17:22 UTCCISA KEV update
  55. 2026-08-27 13:07 UTCGHSA enrichment
  56. 2026-08-27 08:47 UTCGHSA enrichment
  57. 2026-08-27 04:28 UTCGHSA enrichment
  58. 2026-08-27 00:09 UTCGHSA enrichment
  59. 2026-08-26 19:49 UTCGHSA enrichment
  60. 2026-08-26 17:41 UTCCISA KEV update
  61. 2026-08-26 15:30 UTCGHSA enrichment
  62. 2026-08-26 11:11 UTCGHSA enrichment
  63. 2026-08-26 06:51 UTCGHSA enrichment
  64. 2026-08-26 02:31 UTCGHSA enrichment
  65. 2026-08-25 22:12 UTCGHSA enrichment
  66. 2026-08-25 17:52 UTCGHSA enrichment
  67. 2026-08-25 13:33 UTCGHSA enrichment
  68. 2026-08-25 09:14 UTCGHSA enrichment
  69. 2026-08-25 04:54 UTCGHSA enrichment
  70. 2026-08-25 00:35 UTCGHSA enrichment
  71. 2026-08-24 20:14 UTCGHSA enrichment
  72. 2026-08-24 18:52 UTCCISA KEV update
  73. 2026-08-24 15:56 UTCEG score recompute
  74. 2026-08-24 15:55 UTCGHSA enrichment
  75. 2026-08-24 14:14 UTCEPSS rescore

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-2023-38203.yaml
    First seen Jan 1, 2023

    Adobe ColdFusion - Deserialization of Untrusted Data

    Open source ↗

Frequently asked(6)

What is CVE-2023-38203?
CVE-2023-38203 is a critical vulnerability published on July 20, 2023. Adobe ColdFusion versions 2018u17 (and earlier), 2021u7 (and earlier) and 2023u1 (and earlier) are affected by a Deserialization of Untrusted Data vulnerability that could result in Arbitrary code execution. Exploitation of this issue does not require user interaction.
When was CVE-2023-38203 disclosed?
CVE-2023-38203 was first published in the National Vulnerability Database on July 20, 2023, with the most recent update on October 23, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-38203 actively exploited?
Yes. CISA added CVE-2023-38203 to the Known Exploited Vulnerabilities catalog on January 8, 2024, affecting Adobe ColdFusion. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2023-38203?
CVE-2023-38203 has a CVSS v3 base score of 9.8 (NVD).
Which products are affected by CVE-2023-38203?
CVE-2023-38203 affects Adobe ColdFusion. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2023-38203?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-38203, 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

Explore the affected products and dependency analysis for CVE-2023-38203

Explore →

Is Your Infrastructure Affected by CVE-2023-38203?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs