What is CVE-2019-12173?

CVE-2019-12173 is a high-severity vulnerability in Macdown Project, classified under Path Traversal. CVSS score: 8.8/10. Published 2019-05-18.

How severe is CVE-2019-12173?

High severity. CVSS v3 base score is 8.8 out of 10.

Path Traversal in Macdown Project

CVE-2019-12173

MacDown 0.7.1 (870) allows remote code execution via a file:\\\ URI, with a .app pathname, in the HREF attribute of an A element. This is different from CVE-2019-12138.

Vulnerability class: Path Traversal (Directory Traversal)

Published 2019-05-18 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.037 (89.6th percentile), scored 2026-10-09.

Low probability of exploitation in the next 30 days, but still tracked. 90th percentile — 89.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.037 · newest: 0.037 · change: 0.000

Affected products

Macdown Project — versions 0.7.1

Weakness classification (CWE)

CWE-22 — Path Traversal

References

github.com/MacDownApp/macdown/issues/1050 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2019-12173?: CVE-2019-12173 is a high-severity vulnerability in Macdown Project, classified under Path Traversal. CVSS score: 8.8/10. Published 2019-05-18.
How severe is CVE-2019-12173?: High severity. CVSS v3 base score is 8.8 out of 10.