How severe is CVE-2020-19947?

CVE-2020-19947 has a CVSS 3.x base score of 9.6, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-19947 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-19947?

CVE-2020-19947 affects Markdown Edit Project Markdown Edit. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-19947?

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

When was CVE-2020-19947 published?

CVE-2020-19947 was published on 2023-03-16 and last updated on 2026-06-17.

CVE-2020-19947

CVE-2020-19947 is a critical-severity vulnerability in Markdown Edit Project Markdown Edit with a CVSS 3.x base score of 9.6. 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-79.

Key facts

Severity: Critical (CVSS 3.x base score 9.6)
EPSS exploit prediction: 1% (57th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Markdown Edit Project Markdown Edit
Published: 2023-03-16
Last modified: 2026-06-17

Description

Cross Site Scripting vulnerability found in Markdown Edit allows a remote attacker to execute arbitrary code via the edit parameter of the webpage.

Frequently asked questions

What is CVE-2020-19947?: Cross Site Scripting vulnerability found in Markdown Edit allows a remote attacker to execute arbitrary code via the edit parameter of the webpage.
How severe is CVE-2020-19947?: CVE-2020-19947 has a CVSS 3.x base score of 9.6, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-19947 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-19947?: CVE-2020-19947 affects Markdown Edit Project Markdown Edit. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-19947?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2020-19947 published?: CVE-2020-19947 was published on 2023-03-16 and last updated on 2026-06-17.

References

https://github.com/georgeOsdDev/markdown-edit/issues/12

Affected products (1)

cpe:2.3:a:markdown_edit_project:markdown_edit:-:*:*:*:*:*:*:*

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