CVE-2025-11849

CRITICALNVD 9.39.3—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.3 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 50% 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
9.3
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 9.3Exploit: NoneExposed: 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)
EPSS
56.1%
KEV
Not listed

Published

October 17, 2025

Last Modified

April 29, 2026

Advisory Details (6)

Auto-updated May 1, 2026
⚠️ Active exploitation confirmed. No patch confirmed yet.
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
generic

Disable external file access by default · mwilliamson/mammoth.js@c54aaeb · GitHub

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 11× in last 7d / 42× 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.

  1. 2026-07-12 05:46 UTCEPSS rescore
  2. 2026-07-12 05:45 UTCEPSS rescore
  3. 2026-07-11 08:26 UTCEPSS rescore
  4. 2026-07-11 08:26 UTCEPSS rescore
  5. 2026-07-10 04:23 UTCOSV refresh
  6. 2026-07-09 19:09 UTCEPSS rescore
  7. 2026-07-08 15:14 UTCEPSS rescore
  8. 2026-07-07 13:45 UTCEPSS rescore
  9. 2026-07-06 16:26 UTCEPSS rescore
  10. 2026-07-06 02:22 UTCEPSS rescore
  11. 2026-07-06 02:22 UTCEPSS rescore
  12. 2026-07-05 02:30 UTCEPSS rescore
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  14. 2026-07-01 15:06 UTCEPSS rescore
  15. 2026-06-30 23:21 UTCEPSS rescore
  16. 2026-06-29 14:06 UTCEPSS rescore
  17. 2026-06-28 04:55 UTCEPSS rescore
  18. 2026-06-27 03:08 UTCEPSS rescore
  19. 2026-06-27 03:08 UTCEPSS rescore
  20. 2026-06-25 13:49 UTCEPSS rescore
  21. 2026-06-25 13:49 UTCEPSS rescore
  22. 2026-06-24 14:04 UTCEPSS rescore
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  24. 2026-06-23 21:32 UTCEPSS rescore
  25. 2026-06-22 14:25 UTCEPSS rescore
Show 74 more
  1. 2026-06-22 14:25 UTCEPSS rescore
  2. 2026-06-21 14:56 UTCEPSS rescore
  3. 2026-06-21 14:56 UTCEPSS rescore
  4. 2026-06-21 14:31 UTCOSV refresh
  5. 2026-06-21 01:59 UTCEPSS rescore
  6. 2026-06-19 19:25 UTCEPSS rescore
  7. 2026-06-19 19:25 UTCEPSS rescore
  8. 2026-06-18 17:52 UTCEPSS rescore
  9. 2026-06-18 17:52 UTCEPSS rescore
  10. 2026-06-17 17:52 UTCEPSS rescore
  11. 2026-06-16 17:52 UTCEPSS rescore
  12. 2026-06-15 17:48 UTCEPSS rescore
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  14. 2026-06-14 23:17 UTCEPSS rescore
  15. 2026-06-13 22:59 UTCEPSS rescore
  16. 2026-06-12 23:11 UTCEPSS rescore
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  18. 2026-06-11 13:59 UTCEPSS rescore
  19. 2026-06-10 22:18 UTCEPSS rescore
  20. 2026-06-10 22:18 UTCEPSS rescore
  21. 2026-06-10 13:21 UTCEPSS rescore
  22. 2026-06-10 13:21 UTCEPSS rescore
  23. 2026-06-08 14:16 UTCEPSS rescore
  24. 2026-06-08 14:16 UTCEPSS rescore
  25. 2026-06-07 15:24 UTCEPSS rescore
  26. 2026-06-06 13:47 UTCEPSS rescore
  27. 2026-06-06 13:46 UTCEPSS rescore
  28. 2026-06-05 22:46 UTCEPSS rescore
  29. 2026-06-05 22:46 UTCEPSS rescore
  30. 2026-06-05 06:10 UTCEPSS rescore
  31. 2026-06-05 06:09 UTCEPSS rescore
  32. 2026-06-04 13:11 UTCEPSS rescore
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  34. 2026-06-02 20:12 UTCEPSS rescore
  35. 2026-06-02 20:12 UTCEPSS rescore
  36. 2026-06-02 10:39 UTCOSV refresh
  37. 2026-06-01 13:51 UTCEPSS rescore
  38. 2026-06-01 13:51 UTCEPSS rescore
  39. 2026-05-31 22:30 UTCEPSS rescore
  40. 2026-05-31 22:30 UTCEPSS rescore
  41. 2026-05-31 00:16 UTCEPSS rescore
  42. 2026-05-31 00:16 UTCEPSS rescore
  43. 2026-05-29 13:43 UTCEPSS rescore
  44. 2026-05-28 13:44 UTCEPSS rescore
  45. 2026-05-28 13:44 UTCEPSS rescore
  46. 2026-05-28 13:44 UTCEPSS rescore
  47. 2026-05-27 13:40 UTCEPSS rescore
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  49. 2026-05-27 13:40 UTCEPSS rescore
  50. 2026-05-26 13:43 UTCEPSS rescore
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  52. 2026-05-26 13:43 UTCEPSS rescore
  53. 2026-05-26 07:18 UTCEPSS rescore
  54. 2026-05-26 07:18 UTCEPSS rescore
  55. 2026-05-26 07:18 UTCEPSS rescore
  56. 2026-05-26 07:18 UTCEPSS rescore
  57. 2026-05-23 00:09 UTCEG score recompute
  58. 2026-05-22 21:16 UTCEPSS rescore
  59. 2026-05-22 21:16 UTCEPSS rescore
  60. 2026-05-22 21:16 UTCEPSS rescore
  61. 2026-05-22 21:16 UTCEPSS rescore
  62. 2026-05-21 22:42 UTCEPSS rescore
  63. 2026-05-21 06:23 UTCEG score recompute
  64. 2026-05-20 22:37 UTCEPSS rescore
  65. 2026-05-20 22:37 UTCEPSS rescore
  66. 2026-05-20 22:37 UTCEPSS rescore
  67. 2026-05-20 22:37 UTCEPSS rescore
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  69. 2026-05-20 11:21 UTCEPSS rescore
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  72. 2026-05-20 11:21 UTCEPSS rescore
  73. 2026-05-18 21:30 UTCEPSS rescore
  74. 2026-05-18 21:30 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 56.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
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.

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