Path Traversal in Dena H20

CVE-2015-5638

Directory traversal vulnerability in H2O before 1.4.5 and 1.5.x before 1.5.0-beta2, when the file.dir directive is enabled, allows remote attackers to read arbitrary files via a crafted URL.

Vulnerability class: Path Traversal (Directory Traversal)

Published 2015-09-20 · last modified 2026-06-17.

CVSS v2 metric

CVSS v2 base score 4.3 (Medium). Vector: AV:N/AC:M/Au:N/C:P/I:N/A:N. This CVE predates CVSS v3 and has no v3 score from NVD.

EPSS exploit prediction

EPSS: 0.017 (75.6th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 76th percentile — 75.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.017 · newest: 0.017 · change: 0.000

Affected products

Dena H20

Weakness classification (CWE)

CWE-22 — Path Traversal

References

jvndb.jvn.jp/jvndb/JVNDB-2015-000136 (Vendor Advisory, third-party-advisory)
jvn.jp/en/jp/JVN65602714/index.html (Vendor Advisory, third-party-advisory)
h2o.examp1e.net/vulnerabilities.html (Vendor Advisory)