{"id":"CVE-2020-28501","aliases":["EUVD-2021-0844","GHSA-jxg6-fhwc-9v9c"],"status":"published","title":"Regular Expression Denial of Service (ReDoS)","description":"This affects the package es6-crawler-detect before 3.1.3. No limitation of user agent string length supplied to regex operators.","severity":{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-08","score":0.01498,"percentile":0.7442,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-400"],"published":"2021-03-22T12:10:13Z","modified":"2026-06-17T03:10:32Z","fixes":[{"ecosystem":"npm","package":"es6-crawler-detect","fixed_in":["3.1.3"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"es6-crawler-detect","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.1.3"}]}]},{"source":"osv","ecosystem":"npm","package":"es6-crawler-detect","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.1.3"}]}]}],"products":[{"vendor":"crawlerdetect_project","product":"crawlerdetect"}],"references":[{"url":"https://snyk.io/vuln/SNYK-JS-ES6CRAWLERDETECT-1051529","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","web"]},{"url":"https://github.com/JefferyHus/es6-crawler-detect/pull/27","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-28501","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-jxg6-fhwc-9v9c"}],"sources":{"cve":[{"id":"CVE-2020-28501","title":"Regular Expression Denial of Service (ReDoS)","description":"This affects the package es6-crawler-detect before 3.1.3. No limitation of user agent string length supplied to regex operators.","status":"published","published":"2021-03-22T12:10:13.637Z","modified":"2024-09-16T22:40:25.23Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"cna"}],"updated_at":"2026-11-02T14:35:57.017407Z"}],"euvd":[{"id":"EUVD-2021-0844","description":"This affects the package es6-crawler-detect before 3.1.3. No limitation of user agent string length supplied to regex operators.","status":"published","published":"2021-03-22T12:10:13Z","modified":"2024-09-16T22:40:25Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"updated_at":"2026-11-03T00:55:01.173561Z"}],"ghsa":[{"id":"GHSA-jxg6-fhwc-9v9c","title":"Regular Expression Denial of Service (ReDoS) in es6-crawler-detect","description":"This affects the package es6-crawler-detect before 3.1.3. No limitation of user agent string length supplied to regex operators.","status":"published","published":"2021-04-13T15:19:39Z","modified":"2023-02-01T05:05:13Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:36:32.918681Z"}],"nvd":[{"id":"CVE-2020-28501","description":"This affects the package es6-crawler-detect before 3.1.3. No limitation of user agent string length supplied to regex operators.","status":"published","published":"2021-03-22T12:15:13.673Z","modified":"2026-06-17T03:10:32.923Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:06:37.687844Z"}],"osv":[{"id":"GHSA-jxg6-fhwc-9v9c","title":"Regular Expression Denial of Service (ReDoS) in es6-crawler-detect","description":"This affects the package es6-crawler-detect before 3.1.3. No limitation of user agent string length supplied to regex operators.","status":"published","published":"2021-04-13T15:19:39Z","modified":"2026-03-13T22:11:35.700627Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T15:46:51.10002Z"}]}}