CVE-2021-27516
HIGHCVSS 7.5/10EPSS 2.48%
Last modified
CVE-2021-27516 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. URI.js (aka urijs) before 1.19.6 mishandles certain uses of backslash such as http:\/ and interprets the URI as a relative path.. EPSS estimates a 2.48% chance of exploitation in the next 30 days.
Description
URI.js (aka urijs) before 1.19.6 mishandles certain uses of backslash such as http:\/ and interprets the URI as a relative path.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Uri.Js Project | Uri.Js | < 1.19.6 |
References
- https://advisory.checkmarx.net/advisory/CX-2021-4305Exploit, Third Party Advisory
- https://github.com/medialize/URI.js/commit/a1ad8bcbc39a4d136d7e252e76e957f3ece70839Patch, Third Party Advisory
- https://github.com/medialize/URI.js/releases/tag/v1.19.6Third Party Advisory
- https://advisory.checkmarx.net/advisory/CX-2021-4305Exploit, Third Party Advisory
- https://github.com/medialize/URI.js/commit/a1ad8bcbc39a4d136d7e252e76e957f3ece70839Patch, Third Party Advisory
- https://github.com/medialize/URI.js/releases/tag/v1.19.6Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-27516?
URI.js (aka urijs) before 1.19.6 mishandles certain uses of backslash such as http:\/ and interprets the URI as a relative path.
How severe is CVE-2021-27516?
CVE-2021-27516 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 2.48% probability of exploitation in the next 30 days.
How do I fix CVE-2021-27516?
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-2021-27516?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST