Description
Formidable (aka node-formidable) 2.1.0 through 3.x before 3.5.3 relies on hexoid to prevent guessing of filenames for untrusted executable content; however, hexoid is documented as not "cryptographically secure." (Also, there is a scenario in which only the last two characters of a hexoid string need to be guessed, but this is not often relevant.) NOTE: this does not imply that, in a typical use case, attackers will be able to exploit any hexoid behavior to upload and execute their own content.
Published: 2025-04-26
Score: 3.1 Low
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

No analysis available yet.

Remediation

No remediation available yet.

Tracking

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Advisories
Source ID Title
EUVD EUVD EUVD-2025-12478 Formidable relies on hexoid to prevent guessing of filenames for untrusted executable content
Github GHSA Github GHSA GHSA-75v8-2h7p-7m2m Formidable relies on hexoid to prevent guessing of filenames for untrusted executable content
History

Thu, 16 Oct 2025 20:45:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:node-formidable:formidable:*:*:*:*:*:node.js:*:*

Tue, 29 Apr 2025 16:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 28 Apr 2025 14:15:00 +0000

Type Values Removed Values Added
Title formidable: Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG) in Formidable
References
Metrics threat_severity

None

threat_severity

Low


Sat, 26 Apr 2025 20:45:00 +0000

Type Values Removed Values Added
Description Formidable (aka node-formidable) 2.1.0 through 3.x before 3.5.3 relies on hexoid to prevent guessing of filenames for untrusted executable content; however, hexoid is documented as not "cryptographically secure." (Also, there is a scenario in which only the last two characters of a hexoid string need to be guessed, but this is not often relevant.) NOTE: this does not imply that, in a typical use case, attackers will be able to exploit any hexoid behavior to upload and execute their own content.
Weaknesses CWE-338
References
Metrics cvssV3_1

{'score': 3.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N'}


Subscriptions

Node-formidable Formidable
cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2025-04-29T15:22:37.440Z

Reserved: 2025-04-26T00:00:00.000Z

Link: CVE-2025-46653

cve-icon Vulnrichment

Updated: 2025-04-29T14:53:54.144Z

cve-icon NVD

Status : Analyzed

Published: 2025-04-26T21:15:14.403

Modified: 2025-10-16T20:30:37.243

Link: CVE-2025-46653

cve-icon Redhat

Severity : Low

Publid Date: 2025-04-26T00:00:00Z

Links: CVE-2025-46653 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2025-07-12T23:06:12Z

Weaknesses