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CVE-2025-11849

9.3 · CRITICAL

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…

Published Oct 17, 2025CWE-22EPSS 1.01%

Overview

CVE-2025-11849 is a critical-severity vulnerability. It was published on October 17, 2025 and has a CVSS 3.1 base score of 9.3 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.3, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgist.github.com/AudunWA/4d690d9ae5efdafe7cf71d9c2ee90a10GitHubgithub.com/mwilliamson/mammoth.js/commit/c54aaeb43a7941317c1f3c119ffa92090f988820Refsecurity.snyk.io/vuln/SNYK-DOTNET-MAMMOTH-13561968Refsecurity.snyk.io/vuln/SNYK-JAVA-ORGZWOBBLEMAMMOTH-13561969Refsecurity.snyk.io/vuln/SNYK-JS-MAMMOTH-13554470Refsecurity.snyk.io/vuln/SNYK-PYTHON-MAMMOTH-13561967GitHubgist.github.com/AudunWA/4d690d9ae5efdafe7cf71d9c2ee90a10

How CyberStrike helps

Frequently asked questions

What is CVE-2025-11849?

CVE-2025-11849 is a critical-severity vulnerability. It was published on October 17, 2025 and has a CVSS 3.1 base score of 9.3 (CRITICAL).

How severe is CVE-2025-11849?

This vulnerability has a CVSS 3.1 base score of 9.3, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2025-11849?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2025-11849?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-11849 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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