# Duplicate Advisory: ProsemirrorToHtml has a Cross-Site Scripting (XSS) vulnerability through unescaped HTML attribute values

Source: https://junglewise.ai/threats/duplicate-advisory-prosemirrortohtml-has-a-cross-site-scripting-xss-5bb67bf9  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-11-13  
License: CC BY 4.0 with a link back

Severity: medium · CVSS 4 · Published 2025-11-13

Duplicate Advisory: ProsemirrorToHtml has a Cross-Site Scripting (XSS) vulnerability through unescaped HTML attribute values

Technologies: [prosemirror_to_html (RubyGems)](https://junglewise.ai/threats/technologies/prosemirror-to-html). Vendors: [RubyGems](https://junglewise.ai/threats/vendors/rubygems).

## Quick answers

**Is This vulnerability exploited in the wild?** No. Junglewise Threat Intelligence has no report of This vulnerability being exploited in the wild.

**How severe is This vulnerability?** Medium severity, with a CVSS score of 4, published 13 November 2025.

**Which products and versions are affected?** prosemirror_to_html (RubyGems) ECOSYSTEM:introduced=0,fixed=0.2.1.

**Is there a fix for This vulnerability?** Yes. prosemirror_to_html (RubyGems): upgrade to 0.2.1 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected?** Check whether you run prosemirror_to_html (RubyGems) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- prosemirror_to_html (RubyGems): upgrade to 0.2.1 or later

  ```sh
  bundle update prosemirror_to_html
  ```


## Affected products

- prosemirror_to_html (RubyGems) ECOSYSTEM:introduced=0,fixed=0.2.1

## Related threats

- [Cross-Site Scripting (XSS) vulnerability through unescaped HTML attribute values](https://junglewise.ai/threats/cve-2025-64501-cross-site-scripting-xss-vulnerability-through-unescaped-html)
- [Duplicate Advisory: ProsemirrorToHtml has a Cross-Site Scripting (XSS) vulnerability through unescaped HTML attribute values](https://junglewise.ai/threats/duplicate-advisory-prosemirrortohtml-has-a-cross-site-scripting-xss-98e3ca73)