How severe is CVE-2025-32391?

CVE-2025-32391 has a CVSS 3.x base score of 6.4, rated medium severity. It is exploitable over network with high attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2025-32391 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-32391?

CVE-2025-32391 affects Hedgedoc. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-32391?

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

Does CVE-2025-32391 have an EU (EUVD) identifier?

Yes. CVE-2025-32391 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-10682.

When was CVE-2025-32391 published?

CVE-2025-32391 was published on 2025-04-10 and last updated on 2026-06-17.

CVE-2025-32391

CVE-2025-32391 is a medium-severity vulnerability in Hedgedoc with a CVSS 3.x base score of 6.4. 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 3.x base score 6.4)
EPSS exploit prediction: 0% (20th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-10682
Weakness: CWE-79
Affected product: Hedgedoc
Published: 2025-04-10
Last modified: 2026-06-17

Description

HedgeDoc is an open source, real-time, collaborative, markdown notes application. Prior to 1.10.3, a malicious SVG file uploaded to HedgeDoc results in the possibility of XSS when opened in a new tab instead of the editor itself. The XSS is possible by exploiting the JSONP capabilities of GitHub Gist embeddings. Only instances with the local filesystem upload backend or special configurations, where the uploads are served from the same domain as HedgeDoc, are vulnerable. This vulnerability is fixed in 1.10.3. When upgrading to HedgeDoc 1.10.3 is not possible, instance owners could add the following headers for all routes under /uploads as a first-countermeasure: Content-Disposition: attachment and Content-Security-Policy: default-src 'none'. Additionally, the external URLs in the script-src attribute of the Content-Security-Policy header should be removed.

Frequently asked questions

What is CVE-2025-32391?: HedgeDoc is an open source, real-time, collaborative, markdown notes application. Prior to 1.10.3, a malicious SVG file uploaded to HedgeDoc results in the possibility of XSS when opened in a new tab instead of the editor itself. The XSS is possible by exploiting the JSONP capabilities of GitHub Gist embeddings. Only instances with the local filesystem upload backend or special configurations, where the uploads are served from the same domain as HedgeDoc, are vulnerable. This vulnerability is fixed in 1.10.3. When upgrading to HedgeDoc 1.10.3 is not possible, instance owners could add the following headers for all routes under /uploads as a first-countermeasure: Content-Disposition: attachment and Content-Security-Policy: default-src 'none'. Additionally, the external URLs in the script-src attribute of the Content-Security-Policy header should be removed.
How severe is CVE-2025-32391?: CVE-2025-32391 has a CVSS 3.x base score of 6.4, rated medium severity. It is exploitable over network with high attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2025-32391 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-32391?: CVE-2025-32391 affects Hedgedoc. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-32391?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-32391 have an EU (EUVD) identifier?: Yes. CVE-2025-32391 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-10682.
When was CVE-2025-32391 published?: CVE-2025-32391 was published on 2025-04-10 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:hedgedoc:hedgedoc:*:*:*:*:*:*:*:*

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