CVE-2020-11998

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 51.2%, top 1% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Trending — 3 sources updated this weekElevated
9.8
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 51%
CISA-KEV: Not listedEPSS: 51%CVSS: 9.8Exploit: NoneExposed: 0

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

A regression has been introduced in the commit preventing JMX re-bind. By passing an empty environment map to RMIConnectorServer, instead of the map that contains the authentication credentials, it leaves ActiveMQ open to the following attack: https://docs.oracle.com/javase/8/docs/technotes/guides/management/agent.html "A remote client could create a javax.management.loading.MLet MBean and use it to create new MBeans from arbitrary URLs, at least if there is no security manager. In other words, a rogue remote client could make your Java application execute arbitrary code." Mitigation: Upgrade to Apache ActiveMQ 5.15.13

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
69(Track*)
EG Risk 69/100SSVC: 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
Severity98% × 45%
Exploitation51% × 40%
Automatability30% × 15%
Action: Watch closely — could escalate to Attend.
EPSS
98.8%
KEV
Not listed

Published

September 10, 2020

Last Modified

November 21, 2024

Advisory Details (3)

Auto-updated Jul 6, 2026
No patch confirmed yet.
generic
https://lists.apache.org/thread.html/rb2fd3bf2dce042e0ab3f3c94c4767c96bb2e7e6737624d63162df36d%40%3Ccommits.activemq.apache.org%3E
generic
https://lists.apache.org/thread.html/r946488fb942fd35c6a6e0359f52504a558ed438574a8f14d36d7dcd7%40%3Ccommits.activemq.apache.org%3E
generic
http://activemq.apache.org/security-advisories.data/CVE-2020-11998-announcement.txt

Affected Packages

(1 across 1 ecosystem)
Maven(1)
PackageVulnerable rangeFixed inDependents
org.apache.activemq:activemq-parent5.15.125.15.13—

Data Freshness Timeline

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

Frequently asked(5)

What is CVE-2020-11998?
CVE-2020-11998 is a critical vulnerability published on September 10, 2020. A regression has been introduced in the commit preventing JMX re-bind. By passing an empty environment map to RMIConnectorServer, instead of the map that contains the authentication credentials, it leaves ActiveMQ open to the following attack:…
When was CVE-2020-11998 disclosed?
CVE-2020-11998 was first published in the National Vulnerability Database on September 10, 2020, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2020-11998 actively exploited?
CVE-2020-11998 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 98.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2020-11998?
CVE-2020-11998 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2020-11998?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-11998, 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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