CVE-2025-11849
Severity CVSS v4.0:
MEDIUM
Type:
CWE-22
Path Traversal
Publication date:
17/10/2025
Last modified:
21/10/2025
Description
Versions of the package mammoth from 0.3.25 and before 1.11.0; versions of the package mammoth from 0.3.25 and before 1.11.0; versions of the package mammoth before 1.11.0; versions of the package org.zwobble.mammoth:mammoth before 1.11.0 are vulnerable to Directory Traversal due to the lack of path or file type validation when processing a docx file containing an image with an external link (r:link attribute instead of embedded r:embed). The library resolves the URI to a file path and after reading, the content is encoded as base64 and included in the HTML output as a data URI. An attacker can read arbitrary files on the system where the conversion is performed or cause an excessive resources consumption by crafting a docx file that links to special device files such as /dev/random or /dev/zero.
Impact
Base Score 4.0
6.40
Severity 4.0
MEDIUM
Base Score 3.x
9.30
Severity 3.x
CRITICAL
References to Advisories, Solutions, and Tools
- https://gist.github.com/AudunWA/4d690d9ae5efdafe7cf71d9c2ee90a10
- https://github.com/mwilliamson/mammoth.js/commit/c54aaeb43a7941317c1f3c119ffa92090f988820
- https://security.snyk.io/vuln/SNYK-DOTNET-MAMMOTH-13561968
- https://security.snyk.io/vuln/SNYK-JAVA-ORGZWOBBLEMAMMOTH-13561969
- https://security.snyk.io/vuln/SNYK-JS-MAMMOTH-13554470
- https://security.snyk.io/vuln/SNYK-PYTHON-MAMMOTH-13561967
- https://gist.github.com/AudunWA/4d690d9ae5efdafe7cf71d9c2ee90a10