CVE-2025-64501
High · 7.6CVSS
7.6
EPSS
0.2%
Published
Nov 10, 2025
CISA due date
—
The record
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.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| RubyGems | prosemirror_to_html | 0 | 0.2.1 |
Related vulnerabilities
- GHSA-52c5-vh7f-26fx Cross-Site Scripting (XSS) vulnerability through unescaped HTML attribute values Same vulnerability
- GHSA-4249-gjr8-jpq3 Duplicate Advisory: ProsemirrorToHtml has a Cross-Site Scripting (XSS) vulnerability… Also affects prosemirror_to_html
- GHSA-vfpf-xmwh-8m65 Duplicate Advisory: ProsemirrorToHtml has a Cross-Site Scripting (XSS) vulnerability… Also affects prosemirror_to_html
- CVE-2026-96379 Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting")… CWE-79
- CVE-2026-96382 Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting")… CWE-79
- CVE-2026-96368 Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting")… CWE-79
- CVE-2026-96361 Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting")… CWE-79
- CVE-2026-96362 Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting")… CWE-79