Versions of the package mammoth from 0.3.25 and before 1.11.0;...
Vulnerability 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 Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
Am I Vulnerable?
Launch our assessment wizard to check if your infrastructure is exposed to • CVE-2025-11849
Credits & Attribution
The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:
- Audun Wigum Arbo
References
- https://security.snyk.io/vuln/SNYK-JS-MAMMOTH-13554470
- https://security.snyk.io/vuln/SNYK-PYTHON-MAMMOTH-13561967
- https://security.snyk.io/vuln/SNYK-DOTNET-MAMMOTH-13561968
- https://security.snyk.io/vuln/SNYK-JAVA-ORGZWOBBLEMAMMOTH-13561969
- https://gist.github.com/AudunWA/4d690d9ae5efdafe7cf71d9c2ee90a10
- https://github.com/mwilliamson/mammoth.js/commit/c54aaeb43a7941317c1f3c119ffa92090f988820
