How severe is CVE-2009-3437?

CVE-2009-3437 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2009-3437 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-2009-3437?

CVE-2009-3437 affects Henriksjokvist Markdown Preview. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2009-3437?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2009-3437 published?

CVE-2009-3437 was published on 2009-09-28 and last updated on 2026-06-16.

CVE-2009-3437

CVE-2009-3437 is a medium-severity vulnerability in Henriksjokvist Markdown Preview with a CVSS 2.0 base score of 4.3. 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: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 1% (54th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Henriksjokvist Markdown Preview
Published: 2009-09-28
Last modified: 2026-06-16

Description

Cross-site scripting (XSS) vulnerability in the live preview feature in the Markdown Preview module 6.x for Drupal allows remote attackers to inject arbitrary web script or HTML via "Markdown input."

Frequently asked questions

What is CVE-2009-3437?: Cross-site scripting (XSS) vulnerability in the live preview feature in the Markdown Preview module 6.x for Drupal allows remote attackers to inject arbitrary web script or HTML via "Markdown input."
How severe is CVE-2009-3437?: CVE-2009-3437 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2009-3437 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-2009-3437?: CVE-2009-3437 affects Henriksjokvist Markdown Preview. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2009-3437?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2009-3437 published?: CVE-2009-3437 was published on 2009-09-28 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:henriksjokvist:markdown_preview:6.x:*:*:*:*:*:*:*

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