CVE-2021-22143

LOWNVD 2.12.1—
EchelonGraph scoreMEDIUM confidence

This low-severity CVE scores 2.1 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 58% 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
2.1
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 1%CVSS: 2.1Exploit: NoneExposed: 0

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

The Elastic APM .NET Agent can leak sensitive HTTP header information when logging the details during an application error. Normally, the APM agent will sanitize sensitive HTTP header details before sending the information to the APM server. During an application error it is possible the headers will not be sanitized before being sent.

CVSS v3
2.1
EG Score
2.1(medium)
EPSS
45.4%
KEV
Not listed

Published

November 22, 2023

Last Modified

November 21, 2024

References (4)

Affected Packages

(1 across 1 ecosystem)
NuGet(1)
PackageVulnerable rangeFixed inDependents
Elastic.Apm0.0.1 ... 1.9.0 (22 versions)1.10.0—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 48× 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. 2026-07-21 15:22 UTCEPSS rescore
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  3. 2026-07-20 17:04 UTCEPSS rescore
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  10. 2026-07-15 03:49 UTCOSV refresh
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  1. 2026-07-05 02:28 UTCEPSS rescore
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  13. 2026-06-27 04:07 UTCOSV refresh
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  43. 2026-06-09 14:47 UTCOSV refresh
  44. 2026-06-08 14:15 UTCEPSS rescore
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  46. 2026-06-07 15:23 UTCEPSS rescore
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  48. 2026-06-06 13:46 UTCEPSS rescore
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  73. 2026-05-24 16:49 UTCEPSS rescore
  74. 2026-05-24 13:29 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2021-22143?
CVE-2021-22143 is a low vulnerability published on November 22, 2023. The Elastic APM .NET Agent can leak sensitive HTTP header information when logging the details during an application error. Normally, the APM agent will sanitize sensitive HTTP header details before sending the information to the APM server. During an application error it is possible the headers…
When was CVE-2021-22143 disclosed?
CVE-2021-22143 was first published in the National Vulnerability Database on November 22, 2023, 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-2021-22143 actively exploited?
CVE-2021-22143 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 45.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2021-22143?
CVE-2021-22143 has a CVSS v3 base score of 2.1 (NVD).
How do I remediate CVE-2021-22143?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-22143, 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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