@eigenpal/docx-editor-react: CSS injection and print-time XSS via unescaped embedded font-family name
Summary
Embedded font-family names (word/fontTable.xml) were interpolated unescaped into an injected @font-face <style> and into the print window's document.write(). A crafted name injects page-wide CSS on open, and breaks out of <style>
into executable HTML on Print.
Impact
Opening a crafted .docx applies attacker-controlled CSS page-wide with zero clicks (overlay/phishing, attribute-selector exfiltration of input values, tracking beacons). Clicking Print escalates to script execution in the embedder's origin.
Remediation
Upgrade to 1.8.3. Font names are CSS-escaped before interpolation (quotes, backslash, < >, and CSS newlines), and the print window is assembled with DOM APIs instead of document.write.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | @eigenpal/docx-editor-core | < 1.8.3 | 1.8.3 |
| npm package | @eigenpal/docx-editor-react | < 1.8.3 | 1.8.3 |
References
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N- Weakness (CWE)
CWE-79- Platform
- npm
- Package
@eigenpal/docx-editor-core, @eigenpal/docx-editor-react- Disclosed
- 10.09.2026
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-x7m8-jrm8-hpvx - CC BY 4.0
Vulnerability history: @eigenpal/docx-editor-core
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
This is the only known vulnerability of this package.
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