CVE-2023-31421

highpriority · track · 30EPSS 0.003 · 25 %ileEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.32% (25th) EPSS

CVSS 7.5 · high

Is it mine?

12 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-27

It was discovered that when acting as TLS clients, Beats, Elastic Agent, APM Server, and Fleet Server did not verify whether the server certificate is valid for the target IP address; however, certificate signature validation is still performed. More specifically, when the client is configured to connect to an IP address (instead of a hostname) it does not validate the server certificate's IP SAN values against that IP address and certificate validation fails, and therefore the connection is not blocked as expected.

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5.9–7.5

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.15.9mediumAV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:Nsecondary · FSTEC (BDU) RU

v3.15.9mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:Nsecondary · ENISA EU

v3.15.9mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:Nsecondary · security@elastic.coexploitability 2.2 · impact 3.6

v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-295USprimaryCWE-295US

affected products (12)

Products and version ranges known to be affected.

Elastic APM Server≤ 8.0.0, 8.9.2enisa_euvdEU
Elastic Beats≤ 8.0.0, 8.9.2enisa_euvdEU
Elastic Elastic Agent≤ 8.0.0, 8.9.2enisa_euvdEU
Elastic Fleet Server≤ 8.0.0, 8.9.2enisa_euvdEU
Elastic NV Elastic APM Server8.0.0 → 8.9.2fstec_bduRU
Elastic NV Elastic Agent8.0.0 → 8.9.2fstec_bduRU
Elastic NV Elastic Agent Elastic Fleet Server8.0.0 → 8.9.2fstec_bduRU
Elastic NV Elastic Beats8.0.0 → 8.9.2fstec_bduRU
elastic apm server8.0.0 → 8.9.2nvdUScpe:2.3:a:elastic:apm_server:*:*:*:*:*:*:*:*
elastic elastic agent8.0.0 → 8.9.2nvdUScpe:2.3:a:elastic:elastic_agent:*:*:*:*:*:*:*:*
elastic elastic beats8.0.0 → 8.9.2nvdUScpe:2.3:a:elastic:elastic_beats:*:*:*:*:*:*:*:*
elastic elastic fleet server8.0.0 → 8.9.2nvdUScpe:2.3:a:elastic:elastic_fleet_server:*:*:*:*:*:*:*:*

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu nvd NVD CVE.org MITRE

published 2023-10-26modified 2026-06-17

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+1889 more

references (7)

External citations — patches, advisories, analysis.

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