CVE-2025-46653: 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;...
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.
Classification
CVE ID: CVE-2025-46653
CVSS Base Severity: LOW
CVSS Base Score: 3.1
CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N
Affected Products
Vendor: node-formidable
Product: Formidable
Exploit Prediction Scoring System (EPSS)
EPSS Score: 0.03% (probability of being exploited)
EPSS Percentile: 7.01% (scored less or equal to compared to others)
EPSS Date: 2025-05-25 (when was this score calculated)
References
https://nvd.nist.gov/vuln/detail/CVE-2025-46653https://github.com/zast-ai/vulnerability-reports/blob/main/formidable/file_upload/report.md
https://github.com/node-formidable/formidable/blob/d0fbec13edc8add54a1afb9ce1a8d3db803f8d47/CHANGELOG.md?plain=1#L10
https://github.com/node-formidable/formidable/commit/022c2c5577dfe14d2947f10909d81b03b6070bf5