CVE-2013-2423

CRITICALNVD 3.79.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2022-05-25), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 3.7 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 5 sources updated this weekExploited in the wild
9.0EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 85%CVSS: 3.7Exploit: cisa kev · ssvc active · Metasploit · Exploit-DB (verified) · epss top5pct · epss high · public exploitExposed: 0

A fix is available — apply it.

Unspecified vulnerability in the Java Runtime Environment (JRE) component in Oracle Java SE 7 Update 17 and earlier, and OpenJDK 7, allows remote attackers to affect integrity via unknown vectors related to HotSpot. NOTE: the previous information is from the April 2013 CPU. Oracle has not commented on claims from the original researcher that this vulnerability allows remote attackers to bypass permission checks by the MethodHandles method and modify arbitrary public final fields using reflection and type confusion, as demonstrated using integer and double fields to disable the security manager.

CVSS v3
3.7
EG Score
9.0(high)
EG Risk
81(Attend)
EG Risk 81/100SSVC: 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%
Automatability0% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
85%
EPSS %ILE
100%
KEV
⚠ Exploited

Published

April 17, 2013

Last Modified

April 22, 2026

References (33)

Patch Availability(5)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuopenjdk-7-jre (7u21-2.3.9-0ubuntu0.12.10.1) @ quantal2026-07-27ubuntu
redhatjava-1.7.0-ibm-1:1.7.0.4.2-1jpp.1.el6_42013-05-14redhat
redhatjava-1.7.0-oracle-1:1.7.0.21-1jpp.1.el62013-04-18redhat
redhatjava-1.7.0-openjdk-1:1.7.0.19-2.3.9.1.el5_92013-04-17redhat
redhatjava-1.7.0-openjdk-1:1.7.0.19-2.3.9.1.el6_42013-04-17redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

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

All Vendor Advisories

(5)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 57× in last 7d / 324× 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 673 total refreshes for this CVE.

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

Publicly available exploits

(2 references)

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

  • Exploit-DBEDB-24976✓ verified
    First seen Apr 23, 2013

    Java Applet - Reflection Type Confusion Remote Code Execution (Metasploit)

    Open source ↗
  • Metasploitexploit/multi/browser/java_jre17_reflection_types✓ verified
    First seen Jan 10, 2013

    Java Applet Reflection Type Confusion Remote Code Execution

    Open source ↗

Related CVEs(same vendor + same CWE)

Frequently asked(6)

What is CVE-2013-2423?
CVE-2013-2423 is a critical vulnerability published on April 17, 2013. Unspecified vulnerability in the Java Runtime Environment (JRE) component in Oracle Java SE 7 Update 17 and earlier, and OpenJDK 7, allows remote attackers to affect integrity via unknown vectors related to HotSpot. NOTE: the previous information is from the April 2013 CPU. Oracle has not commented…
When was CVE-2013-2423 disclosed?
CVE-2013-2423 was first published in the National Vulnerability Database on April 17, 2013, with the most recent update on April 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2013-2423 actively exploited?
Yes. CISA added CVE-2013-2423 to the Known Exploited Vulnerabilities catalog on May 25, 2022, affecting Oracle Java Runtime Environment (JRE). KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2013-2423?
CVE-2013-2423 has a CVSS v3 base score of 3.7 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2013-2423?
CVE-2013-2423 affects Oracle Java Runtime Environment (JRE). 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-2013-2423?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2013-2423, 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.

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