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Vulnerabilities

Security fix · CVE-2025-64501

ProsemirrorToHtml is a JSON converter which takes ProseMirror-compatible JSON and outputs HTML.

Published Nov 10, 2025 · catalog updated Nov 12, 2025 · ProsemirrorToHtml is a JSON

Last checked Oct 31, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-64501. EPSS is 0.24%. Act only if a listed version of ProsemirrorToHtml is a JSON is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (ProsemirrorToHtml is a JSON).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High7.6
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.24%
Remediation
Version ranges on file
Affected products
vendor etaminstudio prosemirror_to_html < 0.2.1

ProsemirrorToHtml is a JSON converter which takes ProseMirror-compatible JSON and outputs HTML. In versions 0.2.0 and below, the gem is vulnerable to Cross-Site Scripting (XSS) attacks through malicious HTML attribute values. While tag content is properly escaped, attribute values are not, allowing attackers to inject arbitrary JavaScript code. Applications that use to convert ProseMirror documents to HTML, user-generated ProseMirror content, and end users viewing the rendered HTML output are all at risk of attack. This issue is fixed in version 0.2.1.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor etaminstudio prosemirror_to_html < 0.2.1< 0.2.1

How to fix CVE-2025-64501

  • Upgrade

    CVE-2025-64501 lists a fix boundary at 0.2.1. Compare the installed build with that boundary before you change production.

  • Version check

    Affected < 0.2.1

  • Advisory

    Open the cve_org record and follow its fix.

  • Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-64501. EPSS is 0.24%. Act only if a listed version of ProsemirrorToHtml is a JSON is installed.

Which versions are affected?

Compare what you have installed with etaminstudio prosemirror_to_html < 0.2.1 < 0.2.1. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.24%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Nov 10, 2025 · EUVD

    Detected

    ProsemirrorToHtml is a JSON converter which takes ProseMirror-compatible JSON and outputs HTML. In versions 0.2.0 and below, the gem is vulnerable to Cross-Site Scripting (XSS) attacks through malicious HTML attribute values. While tag content is properly escaped, attribute values are not, allowing attackers to inject arbitrary JavaScript code. Applications that use to convert ProseMirror document

  2. Nov 12, 2025 · EUVD

    Updated

    ProsemirrorToHtml is a JSON converter which takes ProseMirror-compatible JSON and outputs HTML. In versions 0.2.0 and below, the gem is vulnerable to Cross-Site Scripting (XSS) attacks through malicious HTML attribute values. While tag content is properly escaped, attribute values are not, allowing attackers to inject arbitrary JavaScript code. Applications that use to convert ProseMirror document

Sources

  • CVE.orgVulnerability recordCVE-2025-64501

    Official CVE identifier

    cve.org
  • EUVDVulnerability recordEUVD-2025-50824

    ProsemirrorToHtml is a JSON converter which takes ProseMirror-compatible JSON and outputs HTML. In versions 0.2.0 and below, the gem is vulnerable to Cross-Site Scripting (XSS) attacks through malicious HTML attribute values. While tag content is properly escaped, attribute value

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 31, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • CVE.orgOct 25, 2026
  • EUVDOct 25, 2026