Vulnerability in Normalize-Url Project
CVE-2021-33502
The normalize-url package before 4.5.1, 5.x before 5.3.1, and 6.x before 6.0.1 for Node.js has a ReDoS (regular expression denial of service) issue because it has exponential performance for data: URLs.
Vulnerability class: ReDoS (Regular Expression Denial of Service)
EPSS: 0.017 (74.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Normalize-url_project Normalize-url — versions 6.0.0
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (x_refsource_CONFIRM, Third Party Advisory, Release Notes)
- cve@mitre.org (x_refsource_CONFIRM, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-33502?
- CVE-2021-33502 is a high-severity vulnerability in Normalize-Url Project, classified under Inefficient Regular Expression Complexity. CVSS score: 7.5/10. Published 2021-05-24.
- How severe is CVE-2021-33502?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2021-33502 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.