Package Instance
Lookup for vulnerable packages by Package URL.
GET /api/packages/73923?format=api
{ "url": "http://public2.vulnerablecode.io/api/packages/73923?format=api", "purl": "pkg:npm/%40ckeditor/ckeditor5-list@27.0.0", "type": "npm", "namespace": "@ckeditor", "name": "ckeditor5-list", "version": "27.0.0", "qualifiers": {}, "subpath": "", "is_vulnerable": false, "next_non_vulnerable_version": null, "latest_non_vulnerable_version": null, "affected_by_vulnerabilities": [], "fixing_vulnerabilities": [ { "url": "http://public2.vulnerablecode.io/api/vulnerabilities/34859?format=api", "vulnerability_id": "VCID-y831-gekf-cqh6", "summary": "Regular expression Denial of Service in multiple packages\n### Impact\nA regular expression denial of service (ReDoS) vulnerability has been discovered in multiple CKEditor 5 packages. The vulnerability allowed to abuse particular regular expressions, which could cause a significant performance drop resulting in a browser tab freeze. It affects all users using the CKEditor 5 packages listed above at version <= 26.0.0.\n\n### Patches\nThe problem has been recognized and patched. The fix will be available in version 27.0.0.\n\n### For more information\nEmail us at security@cksource.com if you have any questions or comments about this advisory.\n\n### Acknowledgements\nThe CKEditor 5 team would like to thank Yeting Li for recognizing and reporting these vulnerabilities.", "references": [ { "reference_url": "https://api.first.org/data/v1/epss?cve=CVE-2021-21391", "reference_id": "", "reference_type": "", "scores": [ { "value": "0.08303", "scoring_system": "epss", "scoring_elements": "0.92226", "published_at": "2026-04-01T12:55:00Z" }, { "value": "0.08303", "scoring_system": "epss", "scoring_elements": "0.92273", "published_at": "2026-04-29T12:55:00Z" }, { "value": "0.08303", "scoring_system": "epss", "scoring_elements": "0.92278", "published_at": "2026-04-26T12:55:00Z" }, { "value": "0.08303", "scoring_system": "epss", "scoring_elements": "0.92277", "published_at": "2026-04-24T12:55:00Z" }, { "value": "0.08303", "scoring_system": "epss", "scoring_elements": "0.92241", "published_at": "2026-04-07T12:55:00Z" }, { "value": "0.08303", "scoring_system": "epss", "scoring_elements": "0.92238", "published_at": "2026-04-04T12:55:00Z" }, { "value": "0.08303", "scoring_system": "epss", "scoring_elements": "0.92233", "published_at": "2026-04-02T12:55:00Z" }, { "value": "0.08303", "scoring_system": "epss", "scoring_elements": "0.92271", "published_at": "2026-04-18T12:55:00Z" }, { "value": "0.08303", "scoring_system": "epss", "scoring_elements": "0.92272", "published_at": "2026-04-21T12:55:00Z" }, { "value": "0.08303", "scoring_system": "epss", "scoring_elements": "0.9226", "published_at": "2026-04-13T12:55:00Z" }, { "value": "0.08303", "scoring_system": "epss", "scoring_elements": "0.92263", "published_at": "2026-04-12T12:55:00Z" }, { "value": "0.08303", "scoring_system": "epss", "scoring_elements": "0.92262", "published_at": "2026-04-11T12:55:00Z" }, { "value": "0.08303", "scoring_system": "epss", "scoring_elements": "0.92256", "published_at": "2026-04-09T12:55:00Z" }, { "value": "0.08303", "scoring_system": "epss", "scoring_elements": "0.92252", "published_at": "2026-04-08T12:55:00Z" } ], "url": "https://api.first.org/data/v1/epss?cve=CVE-2021-21391" }, { "reference_url": "https://github.com/ckeditor/ckeditor5/releases/tag/v27.0.0", "reference_id": "", "reference_type": "", "scores": [ { "value": "6.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/ckeditor/ckeditor5/releases/tag/v27.0.0" }, { "reference_url": "https://github.com/ckeditor/ckeditor5/security/advisories/GHSA-3rh3-wfr4-76mj", "reference_id": "", "reference_type": "", "scores": [ { "value": "6.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H" }, { "value": "MODERATE", "scoring_system": "cvssv3.1_qr", "scoring_elements": "" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/ckeditor/ckeditor5/security/advisories/GHSA-3rh3-wfr4-76mj" }, { "reference_url": "https://nvd.nist.gov/vuln/detail/CVE-2021-21391", "reference_id": "", "reference_type": "", "scores": [ { "value": "6.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-21391" }, { "reference_url": "https://www.npmjs.com/package/@ckeditor/ckeditor5-engine", "reference_id": "", "reference_type": "", "scores": [ { "value": "6.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://www.npmjs.com/package/@ckeditor/ckeditor5-engine" }, { "reference_url": "https://www.npmjs.com/package/@ckeditor/ckeditor5-font", "reference_id": "", "reference_type": "", "scores": [ { "value": "6.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://www.npmjs.com/package/@ckeditor/ckeditor5-font" }, { "reference_url": "https://www.npmjs.com/package/@ckeditor/ckeditor5-image", "reference_id": "", "reference_type": "", "scores": [ { "value": "6.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://www.npmjs.com/package/@ckeditor/ckeditor5-image" }, { "reference_url": "https://www.npmjs.com/package/@ckeditor/ckeditor5-list", "reference_id": "", "reference_type": "", "scores": [ { "value": "6.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://www.npmjs.com/package/@ckeditor/ckeditor5-list" }, { "reference_url": "https://www.npmjs.com/package/@ckeditor/ckeditor5-markdown-gfm", "reference_id": "", "reference_type": "", "scores": [ { "value": "6.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://www.npmjs.com/package/@ckeditor/ckeditor5-markdown-gfm" }, { "reference_url": "https://www.npmjs.com/package/@ckeditor/ckeditor5-media-embed", "reference_id": "", "reference_type": "", "scores": [ { "value": "6.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://www.npmjs.com/package/@ckeditor/ckeditor5-media-embed" }, { "reference_url": "https://www.npmjs.com/package/@ckeditor/ckeditor5-paste-from-office", "reference_id": "", "reference_type": "", "scores": [ { "value": "6.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://www.npmjs.com/package/@ckeditor/ckeditor5-paste-from-office" }, { "reference_url": "https://www.npmjs.com/package/@ckeditor/ckeditor5-widget", "reference_id": "", "reference_type": "", "scores": [ { "value": "6.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H" }, { "value": "MODERATE", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://www.npmjs.com/package/@ckeditor/ckeditor5-widget" }, { "reference_url": "https://github.com/advisories/GHSA-3rh3-wfr4-76mj", "reference_id": "GHSA-3rh3-wfr4-76mj", "reference_type": "", "scores": [ { "value": "MODERATE", "scoring_system": "cvssv3.1_qr", "scoring_elements": "" } ], "url": "https://github.com/advisories/GHSA-3rh3-wfr4-76mj" } ], "fixed_packages": [ { "url": "http://public2.vulnerablecode.io/api/packages/73923?format=api", "purl": "pkg:npm/%40ckeditor/ckeditor5-list@27.0.0", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:npm/%2540ckeditor/ckeditor5-list@27.0.0" } ], "aliases": [ "CVE-2021-21391", "GHSA-3rh3-wfr4-76mj" ], "risk_score": 3.1, "exploitability": "0.5", "weighted_severity": "6.2", "resource_url": "http://public2.vulnerablecode.io/vulnerabilities/VCID-y831-gekf-cqh6" } ], "risk_score": null, "resource_url": "http://public2.vulnerablecode.io/packages/pkg:npm/%2540ckeditor/ckeditor5-list@27.0.0" }