Plate: SSRF with response disclosure in DOCX image embedding
Summary
@platejs/docx-io can fetch remote image URLs while converting HTML to DOCX. When an application converts attacker-controlled HTML in a server-side or privileged environment, this can cause the application environment to make unintended outbound requests and include fetched image data in the generated DOCX.
Impact
Applications are affected when they use @platejs/docx-io to convert untrusted HTML that may contain remote image references, especially in server-side conversion workflows or environments with access to internal network resources.
Affected package:
@platejs/docx-ioversions< 53.3.2
Patched versions
Upgrade to @platejs/docx-io version 53.3.2 or later.
Workarounds
If you cannot upgrade immediately, do not pass untrusted HTML with remote image URLs to DOCX export. Sanitize untrusted HTML to remove remote image references, convert trusted images to data URIs before conversion, or run conversion in an environment with restricted outbound network access.
Credits
Thanks to EQSTLab for reporting this issue.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | @platejs/docx-io | < 53.3.2 | 53.3.2 |
References
- https://github.com/udecode/plate/security/advisories/GHSA-4q39-2jhr-7qx8
- https://nvd.nist.gov/vuln/detail/CVE-2026-65842
- https://github.com/udecode/plate/pull/5053
- https://github.com/udecode/plate/commit/21aa59926f4bbd421027354823cca09c6700ed73
- https://github.com/udecode/plate
- https://github.com/udecode/plate/releases/tag/v53.3.2
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L- Weakness (CWE)
CWE-918- Platform
- npm
- Package
@platejs/docx-io- Disclosed
- 02.09.2026
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-4q39-2jhr-7qx8 - CC BY 4.0
Vulnerability history: @platejs/docx-io
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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