CVE-2025-64501
November 10, 2025
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
https://github.com/etaminstudio/prosemirror_to_html.git (GITHUB):
Affected version(s) >=v0.1.0 <v0.2.1Fix Suggestion:
Update to version v0.2.1prosemirror_to_html (RUBY):
Affected version(s) >=0.1.0 <0.2.1Fix Suggestion:
Update to version 0.2.1prosemirror_to_html (RUBY):
Affected version(s) >=0.1.0 <0.2.1Fix Suggestion:
Update to version 0.2.1Related Resources (7)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
PASSIVE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
HIGH
Subsequent System Integrity
LOW
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.6
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
HIGH
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
EPSS
Base Score:
0.06
