What is CVE-2023-6017?

CVE-2023-6017 is a high-severity vulnerability in H2o, classified under CWE-840. CVSS score: 7.1/10. Published 2023-11-16.

How severe is CVE-2023-6017?

High severity. CVSS v3 base score is 7.1 out of 10.

Is CVE-2023-6017 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in H2o

CVE-2023-6017

H2O included a reference to an S3 bucket that no longer existed allowing an attacker to take over the S3 bucket URL.

Published 2023-11-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.009 (56.7th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 56.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

H2o
H2oai H2oai/h2o-3 — versions unspecified

Weakness classification (CWE)

CWE-840

Public proof-of-concept exploits

Gauravbhatia1211/portfolio

References

huntr.com/bounties/6a69952f-a1ba-4dee-9d8c-e87f52508b58 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2023-6017?: CVE-2023-6017 is a high-severity vulnerability in H2o, classified under CWE-840. CVSS score: 7.1/10. Published 2023-11-16.
How severe is CVE-2023-6017?: High severity. CVSS v3 base score is 7.1 out of 10.
Is CVE-2023-6017 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.