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CVE-2021-22138

LOW
3.7
CVSS Score
Published: May 13, 2021 at 05:35 PM UTC
Updated: June 17, 2026 at 03:36 AM UTC
2 products affected across 1 vendorLogstashElasticsearch

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Severity
LOW3.7
Exploit prediction
EPSS 0.5%

Description

In Logstash versions after 6.4.0 and before 6.8.15 and 7.12.0 a TLS certificate validation flaw was found in the monitoring feature. When specifying a trusted server CA certificate Logstash would not properly verify the certificate returned by the monitoring server. This could result in a man in the middle style attack against the Logstash monitoring data.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Logstash· Elasticelastic-plugin
95%
6.4.0 ≤ v < 6.8.157.0.0 ≤ v < 7.12.0
Affected range stops below 6.8.15, so it looks safe — our inference, not a vendor statement
Affected range stops below 7.12.0, so it looks safe — our inference, not a vendor statement
Elasticsearch· Elasticelastic-plugin
60%
v < 6.8.15
Affected range stops below 6.8.15, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

x_refsource_MISCVendor Advisory
Source: [email protected]
https://discuss.elastic.co/t/elastic-stack-7-12-0-and-6-8-15-security-update/268125
x_refsource_CONFIRMThird Party Advisory
Source: [email protected]
https://security.netapp.com/advisory/ntap-20210629-0001/

CVSS

3.7LOW[email protected]
Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-295

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