{"schema_version":1,"title":"CKEditor 5 vulnerabilities","summary":"Junglewise Threat Intelligence has tracked 3 vulnerabilities in CKEditor 5: 0 in the last 7 days and 0 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-28343, was published on 4 March 2026.","url":"https://junglewise.ai/threats/technologies/ckeditor-5","json_url":"https://junglewise.ai/threats/technologies/ckeditor-5.json","publisher":"Junglewise Threat Intelligence","license":"CC-BY-4.0","license_url":"https://creativecommons.org/licenses/by/4.0/","attribution":"Junglewise Threat Intelligence, https://junglewise.ai/threats/technologies/ckeditor-5","sources":"NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories","kind":"technology","counts":{"high":0,"all_time":3,"critical":0,"exploited":0,"last_7_days":0,"last_30_days":0,"last_90_days":0,"last_365_days":1},"latest":[{"cve":"CVE-2026-28343","cvss":3.1,"epss":0.0035,"slug":"cve-2026-28343-ckeditor-5-cross-site-scripting-in-html-support","title":"CKEditor 5 cross-site scripting in HTML Support","severity":"low","exploited":false,"published_at":"2026-03-04T18:49:32+00:00","url":"https://junglewise.ai/threats/cve-2026-28343-ckeditor-5-cross-site-scripting-in-html-support"},{"cve":"CVE-2025-58064","cvss":4,"epss":0.0042,"slug":"cve-2025-58064-ckeditor-5-cross-site-scripting-in-clipboard-package","title":"CKEditor 5 cross-site scripting in clipboard package","severity":"medium","exploited":false,"published_at":"2025-09-03T18:03:20+00:00","url":"https://junglewise.ai/threats/cve-2025-58064-ckeditor-5-cross-site-scripting-in-clipboard-package"},{"cve":"CVE-2025-25299","cvss":4,"epss":0.006,"slug":"cve-2025-25299-ckeditor-5-cross-site-scripting-in-real-time-collaboration","title":"CKEditor 5 cross-site scripting in real-time collaboration","severity":"medium","exploited":false,"published_at":"2025-02-20T20:16:31+00:00","url":"https://junglewise.ai/threats/cve-2025-25299-ckeditor-5-cross-site-scripting-in-real-time-collaboration"}],"weekly":[{"week":"2026-07-06","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-13","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-20","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-27","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-03","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-10","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-17","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-24","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-31","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-07","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-14","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-21","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-28","critical":0,"exploited":0,"vulnerabilities":0}],"related":[{"name":"CKEditor 4","slug":"ckeditor-4","vulnerabilities":5,"url":"https://junglewise.ai/threats/technologies/ckeditor-4"}],"technology":{"hub":true,"name":"CKEditor 5","slug":"ckeditor-5","vendor":{"name":"CKEditor","slug":"ckeditor","url":"https://junglewise.ai/threats/vendors/ckeditor"},"aliases":[],"category":"library","description":"CKEditor rich text editor library for web-based content editing.","url":"https://junglewise.ai/threats/technologies/ckeditor-5"},"most_severe":[{"cve":"CVE-2025-25299","cvss":4,"epss":0.006,"slug":"cve-2025-25299-ckeditor-5-cross-site-scripting-in-real-time-collaboration","title":"CKEditor 5 cross-site scripting in real-time collaboration","severity":"medium","exploited":false,"published_at":"2025-02-20T20:16:31+00:00","url":"https://junglewise.ai/threats/cve-2025-25299-ckeditor-5-cross-site-scripting-in-real-time-collaboration"},{"cve":"CVE-2025-58064","cvss":4,"epss":0.0042,"slug":"cve-2025-58064-ckeditor-5-cross-site-scripting-in-clipboard-package","title":"CKEditor 5 cross-site scripting in clipboard package","severity":"medium","exploited":false,"published_at":"2025-09-03T18:03:20+00:00","url":"https://junglewise.ai/threats/cve-2025-58064-ckeditor-5-cross-site-scripting-in-clipboard-package"},{"cve":"CVE-2026-28343","cvss":3.1,"epss":0.0035,"slug":"cve-2026-28343-ckeditor-5-cross-site-scripting-in-html-support","title":"CKEditor 5 cross-site scripting in HTML Support","severity":"low","exploited":false,"published_at":"2026-03-04T18:49:32+00:00","url":"https://junglewise.ai/threats/cve-2026-28343-ckeditor-5-cross-site-scripting-in-html-support"}],"generated_at":"2026-09-28T03:07:00.154823+00:00"}