TI-2021-05133 Aliases CVE-2021-22143 GHSA-hx93-gc73-5rpr

Elastic APM .NET Agent information disclosure

LOW 21CWE-200Published 2023-11-22 · Updated 2024-10-11

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: Information disclosure
Confidentiality · integrity · availability: Low · None · None
Fix status: Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-200.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00663 51st percentileScored 2026-11-07

Fix Fixed Elastic APM .NET Agent (Elastic): 1.10.0Elastic.Apm (NuGet): 1.10.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Elastic	Elastic APM .NET Agent	1.0.0 to before 1.10.0	1.10.0	Patch available	CNA
—	Elastic.Apm (NuGet)	before 1.10.0	1.10.0	Patch available	GHSA-hx93-gc73-5rpr

Elastic APM .NET Agent VendorElastic Affected 1.0.0 to before 1.10.0 Fixed in 1.10.0 Patch available CNA
Elastic.Apm (NuGet) Vendor— Affected before 1.10.0 Fixed in 1.10.0 Patch available GHSA-hx93-gc73-5rpr

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:elastic:apm_.net_agent::::::::	before 1.10.0	Vulnerable	Elastic

cpe:2.3:a:elastic:apm_.net_agent:*:*:*:*:*:*:*:* Versions before 1.10.0 Vulnerable ·Elastic

Remediation

Fix · CNA Elastic APM .NET Agent (Elastic) Fixed in 1.10.0
Fix · GHSA-hx93-gc73-5rpr Elastic.Apm (NuGet) Fixed in 1.10.0 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2021-22143
2026-10-03 Alias added: GHSA-hx93-gc73-5rpr
2026-10-06 EPSS moved to the 50th–90th percentile

References

Advisory 3

Other 3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences