Substack's vulnerability profile centers on its minimist command-line argument parser, a narrowly scoped but widely embedded utility dependency in Node.js ecosystems. The observed weakness class reflects prototype-pollution vulnerabilities characteristic of object-handling patterns in JavaScript libraries, where unvalidated input can modify shared prototype chains. Live severity, exploitation, and exposure counts are shown alongside this summary.
The number and severity of CVEs published that impact products developed by Substack over time
Signals from CVEs in this vendor scope (2 CVEs).
2 CVEs · Highest risk first
| CVE | Published | CVSS | Risk | KEV | Exploit |
|---|---|---|---|---|---|
CVE-2021-44906CRITICAL Minimist <=1.2.5 is vulnerable to Prototype Pollution via file index.js, function setKey() (lines 69-95). | Mar 17, 2022 | 9.8 | 33 | NO | NO |
CVE-2020-7598MEDIUM minimist before 1.2.2 could be tricked into adding or modifying properties of Object.prototype using a "constructor" or "__proto__" payload. | Mar 11, 2020 | 5.6 | 18 | NO | NO |
Signals from CVEs in this vendor scope (2 CVEs).
An overview of all social media posts that mention a CVE ID that affects a product developed by Substack.
Media articles that mention a CVE ID that affects a product developed by Substack — matched by CVE ID, not by vendor name.