CVE-2025-11849

CRITICALNVD 9.39.3—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.3 under NVD CVSS v3. EPSS exploit probability: 0.9%, top 43% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Elevated
9.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.3Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
9.3
EG Score
9.3(medium)
EG Risk
58(Track*)
EG Risk 58/100SSVC: Track*

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity93% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
1%
EPSS %ILE
58%
KEV
Not listed

Published

October 17, 2025

Last Modified

April 29, 2026

Advisory Details (6)

Auto-updated Aug 25, 2026
⚠️ Active exploitation confirmed. Upstream fix merged — awaiting tagged release. Sources: github_commit.
generic🟡 PoC Available

Mammoth.js Path Traversal & DoS · GitHub

https://gist.github.com/AudunWA/4d690d9ae5efdafe7cf71d9c2ee90a10
generic🔴 Active Exploitation

Directory Traversal in mammoth | CVE-2025-11849 | Snyk

https://security.snyk.io/vuln/SNYK-PYTHON-MAMMOTH-13561967
generic🔴 Active Exploitation

Directory Traversal in mammoth | CVE-2025-11849 | Snyk

https://security.snyk.io/vuln/SNYK-JS-MAMMOTH-13554470
generic🔴 Active Exploitation

Directory Traversal in org.zwobble.mammoth:mammoth | CVE-2025-11849 | Snyk

https://security.snyk.io/vuln/SNYK-JAVA-ORGZWOBBLEMAMMOTH-13561969
generic🔴 Active Exploitation

Directory Traversal in mammoth | CVE-2025-11849 | Snyk

https://security.snyk.io/vuln/SNYK-DOTNET-MAMMOTH-13561968
github_commit

commit c54aaeb43a79 (mwilliamson/mammoth.js)

Fix landed in mwilliamson/mammoth.js commit c54aaeb43a79 — awaiting tagged release

https://github.com/mwilliamson/mammoth.js/commit/c54aaeb43a7941317c1f3c119ffa92090f988820

Affected Packages

(4 across 4 ecosystems)
Maven(1)
PackageVulnerable rangeFixed inDependents
org.zwobble.mammoth:mammoth0.0.1 ... 1.9.0 (14 versions)1.11.0—
npm(1)
PackageVulnerable rangeFixed inDependents
mammoth—1.11.0—
NuGet(1)
PackageVulnerable rangeFixed inDependents
Mammoth0.0.1 ... 1.8.0 (6 versions)1.11.0—
PyPI(1)
PackageVulnerable rangeFixed inDependents
mammoth0.3.25 ... 1.9.1 (51 versions)1.11.0—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 6× in last 7d / 30× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 152 total refreshes for this CVE.

  1. 2026-08-26 14:45 UTCEPSS rescore
  2. 2026-08-25 13:47 UTCEPSS rescore
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  1. 2026-08-02 02:25 UTCEPSS rescore
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  7. 2026-07-27 09:39 UTCOSV refresh
  8. 2026-07-26 14:53 UTCEPSS rescore
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  27. 2026-07-13 22:29 UTCEPSS rescore
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  34. 2026-07-10 04:23 UTCOSV refresh
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  73. 2026-06-10 22:18 UTCEPSS rescore
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  75. 2026-06-10 13:21 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2025-11849?
CVE-2025-11849 is a critical vulnerability published on October 17, 2025. 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…
When was CVE-2025-11849 disclosed?
CVE-2025-11849 was first published in the National Vulnerability Database on October 17, 2025, with the most recent update on April 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-11849 actively exploited?
CVE-2025-11849 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 41.6% of all scored CVEs.
What is the CVSS score of CVE-2025-11849?
CVE-2025-11849 has a CVSS v3 base score of 9.3 (NVD).
How do I remediate CVE-2025-11849?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-11849, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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