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Fencer Intel
high 8.1

GHSA-x7m8-jrm8-hpvx json

@eigenpal/docx-editor-react: CSS injection and print-time XSS via unescaped embedded font-family name

published 2mo ago modified 2mo ago

cvss
8.1
version 3.1, GitHub
cisa kev
Not listed
not in CISA's catalog
epss
—
no score, EPSS covers CVEs only
public exploits
0
none known

Summary

## 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`.

Patch / fix

  • npm @eigenpal/docx-editor-core 1.8.3
  • npm @eigenpal/docx-editor-react 1.8.3

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CVSS scores

assigned by version score vector
GitHub 3.1 8.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

Affected packages

ecosystem package affected fixed in
npm @eigenpal/docx-editor-core
<1.8.3
1.8.3
npm @eigenpal/docx-editor-react
<1.8.3
1.8.3

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.