Vulnerability details
CVE-2025-64501
etaminstudio prosemirror_to_html
ProsemirrorToHtml: Cross-Site Scripting vulnerability through unescaped HTML attribute values
CVSS 3.1
7.6High
Official 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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.6High | 3.1 | CVEProject cvelistV5 (CNA) (GitHub_M) | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| etaminstudio | prosemirror_to_html | < 0.2.1 | CVEProject cvelistV5 (CNA) |
References and advisories
2
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Details
- Published
- 2025-11-11
- Last updated
- 2025-11-12
- State
- Published
- Assigner (CNA)
- GitHub_M
Exploit prediction (EPSS)
0.23%
Probability of exploitation in 30 days
14.7%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Partial
Weaknesses (CWE)
- CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')