Medium, CVSS 5.4PyPIAmendedPublished
Mammoth is vulnerable to Directory Traversal
CVE-2025-11849 · GHSA-rmjr-87wv-gf87
- Affected
- PyPI mammoth >= 0.3.25, < 1.11.0
- Fixed in
- 1.11.0· Vendor fix available
- Issue
- 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.
Recommended action: Upgrade to 1.11.0 or later, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.