Path Traversal in Microsoft Windows

CVE-2021-28966

In Ruby through 3.0 on Windows, a remote attacker can submit a crafted path when a Web application handles a parameter with TmpDir.

Vulnerability class: Path Traversal (Directory Traversal)

EPSS: 0.571 (99.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

Affected products

Microsoft Windows
Ruby-lang Ruby
N/a — versions n/a

Weakness classification (CWE)

CWE-22 — Path Traversal

Public proof-of-concept exploits

References

cve@mitre.org (Exploit, Patch, Third Party Advisory, x_refsource_MISC, Issue Tracking)
cve@mitre.org (x_refsource_CONFIRM, Third Party Advisory)

Frequently asked questions

What is CVE-2021-28966?: CVE-2021-28966 is a high-severity vulnerability in Microsoft Windows, classified under Path Traversal. CVSS score: 7.5/10. Published 2021-07-30.
How severe is CVE-2021-28966?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2021-28966 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.