How severe is CVE-2019-12138?

CVE-2019-12138 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2019-12138 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-12138?

CVE-2019-12138 affects Macdown Project Macdown. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-12138?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2019-12138 published?

CVE-2019-12138 was published on 2019-05-16 and last updated on 2026-06-17.

CVE-2019-12138

CVE-2019-12138 is a high-severity vulnerability in Macdown Project Macdown with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-22.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 4.6
EPSS exploit prediction: 1% (54th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-22
Affected product: Macdown Project Macdown
Published: 2019-05-16
Last modified: 2026-06-17

Description

MacDown 0.7.1 allows directory traversal, for execution of arbitrary programs, via a file:/// or ../ substring in a shared note.

Frequently asked questions

What is CVE-2019-12138?: MacDown 0.7.1 allows directory traversal, for execution of arbitrary programs, via a file:/// or ../ substring in a shared note.
How severe is CVE-2019-12138?: CVE-2019-12138 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2019-12138 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-12138?: CVE-2019-12138 affects Macdown Project Macdown. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-12138?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2019-12138 published?: CVE-2019-12138 was published on 2019-05-16 and last updated on 2026-06-17.

References

https://github.com/MacDownApp/macdown/issues/1076

Affected products (1)

cpe:2.3:a:macdown_project:macdown:0.7.1:*:*:*:*:*:*:*

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