CVE-2021-23451 is a critical-severity (CVSS 9.8) Insufficient Random Values vulnerability in otp-generator. A fix is available for otp-generator — see the affected versions and patch details below.
otp-generator before v3.0.0 insecurely generates random one-time passwords
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
Where this sits among everything scored
Real-World Exposure
How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.
otp-generatornpmDescription
The package otp-generator before 3.0.0 are vulnerable to Insecure Randomness due to insecure generation of random one-time passwords, which may allow a brute-force attack.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 📦npm | otp-generator | all versions | 3.0.0npm install otp-generator@3.0.0 |
Affected Products
otp-generatorotp-generator_projectDetection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for otp-generator, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update otp-generator to 3.0.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2021-23451 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
Frequently Asked Questions
Is CVE-2021-23451 in your dependencies?
Find it across npm, including transitive dependencies.