CVE-2021-43308
HIGHCVSS 7.5/10EPSS 1.03%
Last modified
CVE-2021-43308 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. An exponential ReDoS (Regular Expression Denial of Service) can be triggered in the markdown-link-extractor npm package, when an attacker is able to supply arbitrary input to the module's exported function. EPSS estimates a 1.03% chance of exploitation in the next 30 days.
Description
An exponential ReDoS (Regular Expression Denial of Service) can be triggered in the markdown-link-extractor npm package, when an attacker is able to supply arbitrary input to the module's exported function
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 |
|---|---|---|
| Markdown-Link-Extractor Project | Markdown-Link-Extractor | < 3.0.2 |
| Markdown-Link-Extractor Project | Markdown-Link-Extractor | 4.0.0 |
References
- https://research.jfrog.com/vulnerabilities/markdown-link-extractor-redos-xray-211350/Exploit, Third Party Advisory
- https://research.jfrog.com/vulnerabilities/markdown-link-extractor-redos-xray-211350/Exploit, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-43308?
An exponential ReDoS (Regular Expression Denial of Service) can be triggered in the markdown-link-extractor npm package, when an attacker is able to supply arbitrary input to the module's exported function
How severe is CVE-2021-43308?
CVE-2021-43308 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.03% probability of exploitation in the next 30 days.
How do I fix CVE-2021-43308?
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-2021-43308?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST