Cross-Site Scripting in htmr

Description

Versions of htmr prior to 0.8.7 are vulnerable to Cross-Site Scripting (XSS). The package uses innerHTML to unescape HTML entities. This may lead to DOM-based XSS through HTML-encoded XSS payloads. This may allow an attacker to execute arbitrary JavaScript in a victim’s browser.

Recommendation

Update the htmr package to the latest compatible version. Followings are version details:

• Affected version(s): < 0.8.7
• Patched version(s): 0.8.7

References

• GHSA-f8rq-m28h-8hxj
• hackerone.com
• www.npmjs.com
• CWE-79
• OWASP 2021-A3

Related Issues

• Cross-Site Scripting in buefy - Vulnerability
• html2pdf.js contains a cross-site scripting vulnerability - CVE-2026-22787
• CKEditor 5 cross-site scripting (XSS) vulnerability in the clipboard package - CVE-2025-58064
• QMarkdown Cross-Site Scripting (XSS) vulnerability - CVE-2025-43954

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How to Secure your NodeJs Express Javascript Application - part 1

How to Secure your NodeJs Express Javascript Application - part 2

10 Secure Coding Best Practices to Follow in Every Project

Tags:

npm

htmr