GHSA-x7m8-jrm8-hpvxPublished

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

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osv · GHSA-x7m8-jrm8-hpvx

Published

## 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`.

Source published: 10 Sep 2026 15:06:16 UTC
Source modified: 10 Sep 2026 15:15:06 UTC
Saved here: 24 Oct 2026 13:17:17 UTC
Source terms: GitHub Advisory Database · CC-BY-4.0

Original source record · Cite this exact observation · Complete original publisher JSON

Source: osv · GitHub Advisory Database · CC-BY-4.0. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

CVSS_V3 · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

Publisher rating · HIGH