{"cve":"CVE-2021-33587","nvd":{"published":"2021-05-28T20:15:07.733","modified":"2026-06-17T03:54:49.983","status":"Modified","description":"The css-what package 4.0.0 through 5.0.0 for Node.js does not ensure that attribute parsing has Linear Time Complexity relative to the size of the input.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":[],"references":["https://github.com/fb55/css-what/releases/tag/v5.0.1","https://lists.debian.org/debian-lts-announce/2023/03/msg00001.html","https://security.netapp.com/advisory/ntap-20210706-0007/","https://github.com/fb55/css-what/releases/tag/v5.0.1","https://lists.debian.org/debian-lts-announce/2023/03/msg00001.html"],"products":["css-what_project:css-what","netapp:e-series_performance_analyzer"],"source":"nvd","synced_at":"2026-10-19T21:18:09.669877188+00:00"},"epss":{"cve":"CVE-2021-33587","score":0.02036,"percentile":0.81091,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-q8pj-2vqx-8ggc","url":"https://osv.dev/vulnerability/GHSA-q8pj-2vqx-8ggc","summary":"Denial of service in css-what","modified":"2023-11-08T04:06:05.682779Z","packages":[{"ecosystem":"npm","name":"css-what","purl":"pkg:npm/css-what","ranges":[">=4.0.0 <5.0.1"],"fixed":["5.0.1"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}