CVE-2021-3803
HIGHCVSS 7.5/10EPSS 2.01%
Last modified
CVE-2021-3803 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. nth-check is vulnerable to Inefficient Regular Expression Complexity. EPSS estimates a 2.01% chance of exploitation in the next 30 days.
Description
nth-check is vulnerable to Inefficient Regular Expression Complexity
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Nth-Check Project | Nth-Check | < 2.0.1 |
| Debian | Debian Linux | 10.0 |
References
- https://github.com/fb55/nth-check/commit/9894c1d2010870c351f66c6f6efcf656e26bb726Patch, Third Party Advisory
- https://huntr.dev/bounties/8cf8cc06-d2cf-4b4e-b42c-99fafb0b04d0Exploit, Issue Tracking, Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/05/msg00023.htmlMailing List, Third Party Advisory
- https://github.com/fb55/nth-check/commit/9894c1d2010870c351f66c6f6efcf656e26bb726Patch, Third Party Advisory
- https://huntr.dev/bounties/8cf8cc06-d2cf-4b4e-b42c-99fafb0b04d0Exploit, Issue Tracking, Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/05/msg00023.htmlMailing List, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-3803?
nth-check is vulnerable to Inefficient Regular Expression Complexity
How severe is CVE-2021-3803?
CVE-2021-3803 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 2.01% probability of exploitation in the next 30 days.
How do I fix CVE-2021-3803?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-3803?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST