What is CVE-2018-7212?

CVE-2018-7212 is a medium-severity vulnerability in Microsoft Windows, classified under Path Traversal. CVSS score: 5.3/10. Published 2018-02-18.

How severe is CVE-2018-7212?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Path Traversal in Microsoft Windows

CVE-2018-7212

An issue was discovered in rack-protection/lib/rack/protection/path_traversal.rb in Sinatra 2.x before 2.0.1 on Windows. Path traversal is possible via backslash characters.

Vulnerability class: Path Traversal (Directory Traversal)

Published 2018-02-18 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.018 (78.1th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 78th percentile — 78.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.018 · newest: 0.018 · change: 0.000

Affected products

Microsoft Windows
Sinatrarb Sinatra — versions 2.0.0, 2.0.1

Weakness classification (CWE)

CWE-22 — Path Traversal

References

github.com/sinatra/sinatra/commit/6ad721abcfe36334108dcdd05d046c361e1b7a9c (Third Party Advisory)
github.com/sinatra/sinatra/pull/1379 (Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2018-7212?: CVE-2018-7212 is a medium-severity vulnerability in Microsoft Windows, classified under Path Traversal. CVSS score: 5.3/10. Published 2018-02-18.
How severe is CVE-2018-7212?: Medium severity. CVSS v3 base score is 5.3 out of 10.