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)
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.017 (76.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 76th percentile — 76.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.017 · newest: 0.017 · change: 0.000
Affected products
- Normalize-Url Project — versions 6.0.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/sindresorhus/normalize-url/releases/tag/v6.0.1 (Third Party Advisory, Release Notes)
- security.netapp.com/advisory/ntap-20210706-0001/ (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.