Prototype Pollution in Substack Minimist
CVE-2021-44906
Minimist <=1.2.5 is vulnerable to Prototype Pollution via file index.js, function setKey() (lines 69-95).
Vulnerability class: Prototype Pollution
EPSS: 0.046 (90.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Substack Minimist
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (Exploit, Patch, Third Party Advisory, Not Applicable)
- cve@mitre.org (Exploit, Third Party Advisory)
- cve@mitre.org (Exploit, Third Party Advisory)
- cve@mitre.org (Third Party Advisory, Issue Tracking)
- cve@mitre.org (Exploit, Patch, Third Party Advisory, Issue Tracking)
- cve@mitre.org
Frequently asked questions
- What is CVE-2021-44906?
- CVE-2021-44906 is a critical-severity vulnerability in Substack Minimist, classified under Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution). CVSS score: 9.8/10. Published 2022-03-17.
- How severe is CVE-2021-44906?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2021-44906 known to be exploited?
- 13 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.