ProsemirrorToHtml is a JSON converter which takes ProseMirror-compatible JSON and outputs HTML. In versions 0.2.0 and below, the `prosemirror_to_html` 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 `prosemirror_to_html` 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.
Metrics
Affected Vendors & Products
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Advisories
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Fixes
Solution
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Workaround
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References
History
Mon, 10 Nov 2025 21:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | ProsemirrorToHtml is a JSON converter which takes ProseMirror-compatible JSON and outputs HTML. In versions 0.2.0 and below, the `prosemirror_to_html` 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 `prosemirror_to_html` 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. | |
| Title | ProsemirrorToHtml: Cross-Site Scripting vulnerability through unescaped HTML attribute values | |
| Weaknesses | CWE-79 | |
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cvssV3_1
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MITRE
Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2025-11-10T21:37:01.010Z
Reserved: 2025-11-05T19:12:25.104Z
Link: CVE-2025-64501
Vulnrichment
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NVD
Status : Received
Published: 2025-11-10T22:15:37.683
Modified: 2025-11-10T22:15:37.683
Link: CVE-2025-64501
Redhat
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OpenCVE Enrichment
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