CVE-2023-21839

HIGHNVD 7.59.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2023-05-01), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 7.5 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
7.5
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS: 100%CVSS: 7.5Exploit: NoneExposed: 0

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

Vulnerability in the Oracle WebLogic Server product of Oracle Fusion Middleware (component: Core). Supported versions that are affected are 12.2.1.3.0, 12.2.1.4.0 and 14.1.1.0.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via T3, IIOP to compromise Oracle WebLogic Server. Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all Oracle WebLogic Server accessible data. CVSS 3.1 Base Score 7.5 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N).

CVSS v3
7.5
EG Score
9.0(high)
EG Risk
96(Attend)
EG Risk 96/100SSVC: 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
Severity90% × 45%
Exploitation100% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS
100.0%
KEV
⚠ Exploited

Published

January 18, 2023

Last Modified

October 27, 2025

Advisory Details (2)

Auto-updated Jun 6, 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-2023-21839
generic

Packet Storm

http://packetstormsecurity.com/files/172882/Oracle-Weblogic-PreAuth-Remote-Command-Execution.html

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 40× in last 7d / 187× 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 354 total refreshes for this CVE.

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

Publicly available exploits

(9 references)

Working exploit code is in the public domain (1 Metasploit module) (7 GitHub PoCs). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCdinosn/CVE-2024-21182
    First seen Jun 2, 2026

    Reproducible Docker lab for CVE-2024-21182 — Oracle WebLogic T3/IIOP OpaqueReference JNDI injection → unauthenticated RCE (CVE-2023-21839 patch-bypass family). One-command validate.sh.

    Open source ↗
  • GitHub PoCdinosn/CVE-2024-20931
    First seen Feb 6, 2024

    CVE-2024-20931, this is the bypass of the patch of CVE-2023-21839

    Open source ↗
  • GitHub PoCRomanc9/Gui-poc-test
    First seen Dec 3, 2023

    A testing tool for CobaltStrike-RCE:CVE-2022-39197; Weblogic-RCE:CVE-2023-21839; MinIO:CVE-2023-28432

    Open source ↗
  • GitHub PoChouqe/POC_CVE-2023-21839
    First seen Apr 15, 2023

    CVE-2023-21839 Python版本

    Open source ↗
  • GitHub PoCFirebasky/CVE-2023-21839
    First seen Mar 11, 2023

    CVE-2023-21839工具

    Open source ↗
  • GitHub PoCASkyeye/CVE-2023-21839
    First seen Feb 24, 2023

    Weblogic CVE-2023-21839 RCE (无需Java依赖一键RCE)

    Open source ↗
  • GitHub PoCDXask88MA/Weblogic-CVE-2023-21839
    First seen Feb 21, 2023
    Open source ↗
  • Metasploitexploit/multi/iiop/cve_2023_21839_weblogic_rce✓ verified
    First seen Jan 17, 2023

    Oracle Weblogic PreAuth Remote Command Execution via ForeignOpaqueReference IIOP Deserialization

    Open source ↗
  • Nucleijavascript/cves/2023/CVE-2023-21839.yaml
    First seen Jan 1, 2023

    Oracle WebLogic Server - Unauthorized Access

    Open source ↗

Related CVEs(same CWE)

Frequently asked(6)

What is CVE-2023-21839?
CVE-2023-21839 is a high vulnerability published on January 18, 2023. Vulnerability in the Oracle WebLogic Server product of Oracle Fusion Middleware (component: Core). Supported versions that are affected are 12.2.1.3.0, 12.2.1.4.0 and 14.1.1.0.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via T3, IIOP to compromise Oracle…
When was CVE-2023-21839 disclosed?
CVE-2023-21839 was first published in the National Vulnerability Database on January 18, 2023, with the most recent update on October 27, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-21839 actively exploited?
Yes. CISA added CVE-2023-21839 to the Known Exploited Vulnerabilities catalog on May 1, 2023, affecting Oracle WebLogic Server. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2023-21839?
CVE-2023-21839 has a CVSS v3 base score of 7.5 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2023-21839?
CVE-2023-21839 affects Oracle WebLogic Server. 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-2023-21839?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-21839, 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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