{"id":"CVE-2020-9440","aliases":["EUVD-2020-30260","GHSA-pv45-3557-fx76","UBUNTU-CVE-2020-9440"],"status":"published","title":"A cross-site scripting (XSS) vulnerability in the WSC plugin through 5.5.7.5 for CKEditor 4...","description":"A cross-site scripting (XSS) vulnerability in the WSC plugin through 5.5.7.5 for CKEditor 4 allows remote attackers to run arbitrary web script inside an IFRAME element by injecting a crafted HTML element into the editor.","severity":{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.0131,"percentile":0.70851,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2020-03-10T16:57:12Z","modified":"2026-10-24T10:30:31Z","affected":[{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"ckeditor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.4.4+dfsg1-3","4.5.6+dfsg-1","4.5.7+dfsg-1","4.5.7+dfsg-2","4.5.7+dfsg-2ubuntu0.16.04.1~esm1","4.5.7+dfsg-2ubuntu0.16.04.1~esm2","4.5.7+dfsg-2ubuntu0.16.04.1~esm3"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"ckeditor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.5.7+dfsg-2","4.5.7+dfsg-2ubuntu0.18.04.1","4.5.7+dfsg-2ubuntu0.18.04.1+esm1","4.5.7+dfsg-2ubuntu0.18.04.1+esm2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:20.04:LTS","package":"ckeditor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.11.1+dfsg-1","4.12.1+dfsg-1","4.12.1+dfsg-1ubuntu0.1","4.12.1+dfsg-1ubuntu0.1+esm1","4.12.1+dfsg-1ubuntu0.1+esm2"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"ckeditor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.16.0+dfsg-2","4.16.2+dfsg-1"]}],"products":[{"vendor":"ckeditor","product":"ckeditor"},{"vendor":"fedoraproject","product":"fedora"},{"vendor":"webspellchecker","product":"webspellchecker"}],"references":[{"url":"https://ckeditor.com/blog/CKEditor-4.14-with-Paste-from-LibreOffice-released/#security-issues-fixed","tags":["x_refsource_MISC","x_transferred","Vendor Advisory","advisory","report"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7OJ4BSS3VEAEXPNSOOUAXX6RDNECGZNO/","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred","web"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M4HHYQ6N452XTCIROFMJOTYEUWSB6FR4/","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred","web"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L322YA73LCV3TO7ORY45WQDAFJVNKXBE/","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-9440"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7OJ4BSS3VEAEXPNSOOUAXX6RDNECGZNO/"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/L322YA73LCV3TO7ORY45WQDAFJVNKXBE/"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/M4HHYQ6N452XTCIROFMJOTYEUWSB6FR4/"},{"url":"https://github.com/advisories/GHSA-pv45-3557-fx76"},{"url":"https://ubuntu.com/security/CVE-2020-9440","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-9440","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2020-9440","description":"A cross-site scripting (XSS) vulnerability in the WSC plugin through 5.5.7.5 for CKEditor 4 allows remote attackers to run arbitrary web script inside an IFRAME element by injecting a crafted HTML element into the editor.","status":"published","published":"2020-03-10T16:57:12Z","modified":"2024-08-04T10:26:16.1Z","updated_at":"2026-11-02T14:35:49.538427Z"}],"euvd":[{"id":"EUVD-2020-30260","description":"A cross-site scripting (XSS) vulnerability in the WSC plugin through 5.5.7.5 for CKEditor 4 allows remote attackers to run arbitrary web script inside an IFRAME element by injecting a crafted HTML element into the editor.","status":"published","published":"2020-03-10T16:57:12Z","modified":"2024-08-04T10:26:16Z","updated_at":"2026-11-03T03:07:54.025234Z"}],"ghsa":[{"id":"GHSA-pv45-3557-fx76","title":"A cross-site scripting (XSS) vulnerability in the WSC plugin through 5.5.7.5 for CKEditor 4...","description":"A cross-site scripting (XSS) vulnerability in the WSC plugin through 5.5.7.5 for CKEditor 4 allows remote attackers to run arbitrary web script inside an IFRAME element by injecting a crafted HTML element into the editor.","status":"published","published":"2022-05-24T17:10:45Z","modified":"2023-01-29T05:01:44Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:44:53.993473Z"}],"nvd":[{"id":"CVE-2020-9440","description":"A cross-site scripting (XSS) vulnerability in the WSC plugin through 5.5.7.5 for CKEditor 4 allows remote attackers to run arbitrary web script inside an IFRAME element by injecting a crafted HTML element into the editor.","status":"published","published":"2020-03-10T17:15:13.207Z","modified":"2026-06-17T03:27:57.413Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:05:55.32877Z"}],"osv":[{"id":"CVE-2020-9440","description":"A cross-site scripting (XSS) vulnerability in the WSC plugin through 5.5.7.5 for CKEditor 4 allows remote attackers to run arbitrary web script inside an IFRAME element by injecting a crafted HTML element into the editor.","status":"published","published":"2020-03-10T17:15:13.207Z","modified":"2026-10-24T10:30:31.939294552Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:17.663289Z"},{"id":"UBUNTU-CVE-2020-9440","description":"A cross-site scripting (XSS) vulnerability in the WSC plugin through 5.5.7.5 for CKEditor 4 allows remote attackers to run arbitrary web script inside an IFRAME element by injecting a crafted HTML element into the editor.","status":"published","published":"2020-03-10T17:15:00Z","modified":"2026-02-04T06:30:32.778254Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:54:25.728622Z"}]}}