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4 ReDoS Vulnerability\nIt was possible to execute a ReDoS-type attack inside CKEditor 4 before 4.16 by persuading a victim to paste crafted text into the Styles input of specific dialogs (in the Advanced Tab for Dialogs plugin).","references":[{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2021-26271","reference_id":"","reference_type":"","scores":[{"value":"0.00617","scoring_system":"epss","scoring_elements":"0.70024","published_at":"2026-04-29T12:55:00Z"},{"value":"0.00617","scoring_system":"epss","scoring_elements":"0.69867","published_at":"2026-04-01T12:55:00Z"},{"value":"0.00617","scoring_system":"epss","scoring_elements":"0.69879","published_at":"2026-04-02T12:55:00Z"},{"value":"0.00617","scoring_system":"epss","scoring_elements":"0.69894","published_at":"2026-04-04T12:55:00Z"},{"value":"0.00617","scoring_system":"epss","scoring_elements":"0.69871","published_at":"2026-04-07T12:55:00Z"},{"value":"0.00617","scoring_system":"epss","scoring_elements":"0.69919","published_at":"2026-04-08T12:55:00Z"},{"value":"0.00617","scoring_system":"epss","scoring_elements":"0.69935","published_at":"2026-04-09T12:55:00Z"},{"value":"0.00617","scoring_system":"epss","scoring_elements":"0.69959","published_at":"2026-04-11T12:55:00Z"},{"value":"0.00617","scoring_system":"epss","scoring_elements":"0.69943","published_at":"2026-04-12T12:55:00Z"},{"value":"0.00617","scoring_system":"epss","scoring_elements":"0.69929","published_at":"2026-04-13T12:55:00Z"},{"value":"0.00617","scoring_system":"epss","scoring_elements":"0.69972","published_at":"2026-04-16T12:55:00Z"},{"value":"0.00617","scoring_system":"epss","scoring_elements":"0.69982","published_at":"2026-04-18T12:55:00Z"},{"value":"0.00617","scoring_system":"epss","scoring_elements":"0.69964","published_at":"2026-04-21T12:55:00Z"},{"value":"0.00617","scoring_system":"epss","scoring_elements":"0.70015","published_at":"2026-04-24T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2021-26271"},{"reference_url":"https://ckeditor.com/blog/CKEditor-4.16-with-improved-image-pasting-High-Contrast-support-and-a-new-color-API/#security-comes-first","reference_id":"","reference_type":"","scores":[],"url":"https://ckeditor.com/blog/CKEditor-4.16-with-improved-image-pasting-High-Contrast-support-and-a-new-color-API/#security-comes-first"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-26271","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-26271"},{"reference_url":"https://github.com/ckeditor/ckeditor4","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/ckeditor4"},{"reference_url":"https://github.com/ckeditor/ckeditor4/blob/major/CHANGES.md#ckeditor-416","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/ckeditor4/blob/major/CHANGES.md#ckeditor-416"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2021-26271","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-2021-26271"},{"reference_url":"https://web.archive.org/web/20210128132707/https://ckeditor.com/blog/CKEditor-4.16-with-improved-image-pasting-High-Contrast-support-and-a-new-color-API/#security-comes-first","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://web.archive.org/web/20210128132707/https://ckeditor.com/blog/CKEditor-4.16-with-improved-image-pasting-High-Contrast-support-and-a-new-color-API/#security-comes-first"},{"reference_url":"https://www.oracle.com//security-alerts/cpujul2021.html","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.oracle.com//security-alerts/cpujul2021.html"},{"reference_url":"https://www.oracle.com/security-alerts/cpuoct2021.html","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.oracle.com/security-alerts/cpuoct2021.html"},{"reference_url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=982587","reference_id":"982587","reference_type":"","scores":[],"url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=982587"},{"reference_url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of Functionality from Untrusted Control Sphere in CKEditor 4\nIt was possible to execute a ReDoS-type attack inside CKEditor 4 before 4.16 by persuading a victim to paste crafted URL-like text into the editor, and then press Enter or Space (in the Autolink plugin).","references":[{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2021-26272","reference_id":"","reference_type":"","scores":[{"value":"0.00502","scoring_system":"epss","scoring_elements":"0.66086","published_at":"2026-04-29T12:55:00Z"},{"value":"0.00502","scoring_system":"epss","scoring_elements":"0.65943","published_at":"2026-04-01T12:55:00Z"},{"value":"0.00502","scoring_system":"epss","scoring_elements":"0.65985","published_at":"2026-04-02T12:55:00Z"},{"value":"0.00502","scoring_system":"epss","scoring_elements":"0.66014","published_at":"2026-04-04T12:55:00Z"},{"value":"0.00502","scoring_system":"epss","scoring_elements":"0.6598","published_at":"2026-04-07T12:55:00Z"},{"value":"0.00502","scoring_system":"epss","scoring_elements":"0.6603","published_at":"2026-04-08T12:55:00Z"},{"value":"0.00502","scoring_system":"epss","scoring_elements":"0.66042","published_at":"2026-04-09T12:55:00Z"},{"value":"0.00502","scoring_system":"epss","scoring_elements":"0.66061","published_at":"2026-04-11T12:55:00Z"},{"value":"0.00502","scoring_system":"epss","scoring_elements":"0.66049","published_at":"2026-04-12T12:55:00Z"},{"value":"0.00502","scoring_system":"epss","scoring_elements":"0.66018","published_at":"2026-04-13T12:55:00Z"},{"value":"0.00502","scoring_system":"epss","scoring_elements":"0.66054","published_at":"2026-04-16T12:55:00Z"},{"value":"0.00502","scoring_system":"epss","scoring_elements":"0.66068","published_at":"2026-04-18T12:55:00Z"},{"value":"0.00502","scoring_system":"epss","scoring_elements":"0.66056","published_at":"2026-04-21T12:55:00Z"},{"value":"0.00502","scoring_system":"epss","scoring_elements":"0.66077","published_at":"2026-04-24T12:55:00Z"},{"value":"0.00502","scoring_system":"epss","scoring_elements":"0.66088","published_at":"2026-04-26T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2021-26272"},{"reference_url":"https://ckeditor.com/blog/CKEditor-4.16-with-improved-image-pasting-High-Contrast-support-and-a-new-color-API/#security-comes-first","reference_id":"","reference_type":"","scores":[{"value":"6.5","scoring_system":"cvssv3","scoring_elements":""},{"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://ckeditor.com/blog/CKEditor-4.16-with-improved-image-pasting-High-Contrast-support-and-a-new-color-API/#security-comes-first"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-26272","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-26272"},{"reference_url":"https://github.com/ckeditor/ckeditor4","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/ckeditor4"},{"reference_url":"https://github.com/ckeditor/ckeditor4/blob/major/CHANGES.md#ckeditor-416","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/ckeditor4/blob/major/CHANGES.md#ckeditor-416"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2021-26272","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-2021-26272"},{"reference_url":"https://www.oracle.com/security-alerts/cpujan2022.html","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.oracle.com/security-alerts/cpujan2022.html"},{"reference_url":"https://www.oracle.com//security-alerts/cpujul2021.html","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.oracle.com//security-alerts/cpujul2021.html"},{"reference_url":"https://www.oracle.com/security-alerts/cpuoct2021.html","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.oracle.com/security-alerts/cpuoct2021.html"},{"reference_url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=982587","reference_id":"982587","reference_type":"","scores":[],"url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=982587"},{"reference_url":"https://github.com/advisories/GHSA-wpvm-wqr4-p7cw","reference_id":"GHSA-wpvm-wqr4-p7cw","reference_type":"","scores":[{"value":"MODERATE","scoring_system":"cvssv3.1_qr","scoring_elements":""}],"url":"https://github.com/advisories/GHSA-wpvm-wqr4-p7cw"}],"fixed_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/582225?format=json","purl":"pkg:deb/debian/ckeditor3@0?distro=bullseye","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:deb/debian/ckeditor3@0%3Fdistro=bullseye"},{"url":"http://public2.vulnerablecode.io/api/packages/582226?format=json","purl":"pkg:deb/debian/ckeditor3@3.6.6.1%2Bdfsg-7?distro=bullseye","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:deb/debian/ckeditor3@3.6.6.1%252Bdfsg-7%3Fdistro=bullseye"}],"aliases":["CVE-2021-26272","GHSA-wpvm-wqr4-p7cw"],"risk_score":3.1,"exploitability":"0.5","weighted_severity":"6.2","resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-h5zz-wz8f-2uf6"},{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/13458?format=json","vulnerability_id":"VCID-usbf-pmfq-1fb6","summary":"Cross-site scripting (XSS) in the clipboard package\n### Impact\nDuring a recent internal audit, we identified a Cross-Site Scripting (XSS) vulnerability in the CKEditor 5 clipboard package. This vulnerability could be triggered by a specific user action, leading to unauthorized JavaScript code execution, if the attacker managed to insert a malicious content into the editor, which might happen with a very specific editor configuration.\n\nThis vulnerability affects **only** installations where the editor configuration meets the following criteria:\n\n1. The [**Block Toolbar**](https://ckeditor.com/docs/ckeditor5/latest/getting-started/setup/toolbar.html#block-toolbar) plugin is enabled.\n1. One of the following plugins is also enabled:\n    - [**General HTML Support**](https://ckeditor.com/docs/ckeditor5/latest/features/html/general-html-support.html) with a configuration that permits unsafe markup.\n    - [**HTML Embed**](https://ckeditor.com/docs/ckeditor5/latest/features/html/html-embed.html).\n\n### Patches\nThe problem has been recognized and patched. The fix will be available in version 43.1.1 (and above), and explicitly in version 41.3.2.\n\n### Workarounds\nIt's highly recommended to update to the version 43.1.1 or higher. However, if the update is not an option, we recommend disabling the block toolbar plugin.\n\n### For more information\nEmail us at [security@cksource.com](mailto:security@cksource.com) if you have any questions or comments about this advisory.","references":[{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2024-45613","reference_id":"","reference_type":"","scores":[{"value":"0.00273","scoring_system":"epss","scoring_elements":"0.50766","published_at":"2026-04-09T12:55:00Z"},{"value":"0.00273","scoring_system":"epss","scoring_elements":"0.50705","published_at":"2026-04-29T12:55:00Z"},{"value":"0.00273","scoring_system":"epss","scoring_elements":"0.50751","published_at":"2026-04-26T12:55:00Z"},{"value":"0.00273","scoring_system":"epss","scoring_elements":"0.50743","published_at":"2026-04-24T12:55:00Z"},{"value":"0.00273","scoring_system":"epss","scoring_elements":"0.50794","published_at":"2026-04-21T12:55:00Z"},{"value":"0.00273","scoring_system":"epss","scoring_elements":"0.50815","published_at":"2026-04-18T12:55:00Z"},{"value":"0.00273","scoring_system":"epss","scoring_elements":"0.50786","published_at":"2026-04-12T12:55:00Z"},{"value":"0.00273","scoring_system":"epss","scoring_elements":"0.50809","published_at":"2026-04-16T12:55:00Z"},{"value":"0.00273","scoring_system":"epss","scoring_elements":"0.50733","published_at":"2026-04-02T12:55:00Z"},{"value":"0.00273","scoring_system":"epss","scoring_elements":"0.50758","published_at":"2026-04-04T12:55:00Z"},{"value":"0.00273","scoring_system":"epss","scoring_elements":"0.50714","published_at":"2026-04-07T12:55:00Z"},{"value":"0.00273","scoring_system":"epss","scoring_elements":"0.5077","published_at":"2026-04-13T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2024-45613"},{"reference_url":"https://github.com/ckeditor/ckeditor5","reference_id":"","reference_type":"","scores":[{"value":"7.2","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N"},{"value":"5.1","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/ckeditor/ckeditor5"},{"reference_url":"https://github.com/ckeditor/ckeditor5/releases/tag/v43.1.1","reference_id":"","reference_type":"","scores":[{"value":"7.2","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N"},{"value":"5.1","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2024-09-25T14:23:40Z/"}],"url":"https://github.com/ckeditor/ckeditor5/releases/tag/v43.1.1"},{"reference_url":"https://github.com/ckeditor/ckeditor5/security/advisories/GHSA-rgg8-g5x8-wr9v","reference_id":"","reference_type":"","scores":[{"value":"7.2","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N"},{"value":"MODERATE","scoring_system":"cvssv3.1_qr","scoring_elements":""},{"value":"5.1","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2024-09-25T14:23:40Z/"}],"url":"https://github.com/ckeditor/ckeditor5/security/advisories/GHSA-rgg8-g5x8-wr9v"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2024-45613","reference_id":"","reference_type":"","scores":[{"value":"7.2","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N"},{"value":"5.1","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-45613"},{"reference_url":"https://github.com/advisories/GHSA-rgg8-g5x8-wr9v","reference_id":"GHSA-rgg8-g5x8-wr9v","reference_type":"","scores":[{"value":"MODERATE","scoring_system":"cvssv3.1_qr","scoring_elements":""}],"url":"https://github.com/advisories/GHSA-rgg8-g5x8-wr9v"}],"fixed_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/582225?format=json","purl":"pkg:deb/debian/ckeditor3@0?distro=bullseye","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:deb/debian/ckeditor3@0%3Fdistro=bullseye"},{"url":"http://public2.vulnerablecode.io/api/packages/582226?format=json","purl":"pkg:deb/debian/ckeditor3@3.6.6.1%2Bdfsg-7?distro=bullseye","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:deb/debian/ckeditor3@3.6.6.1%252Bdfsg-7%3Fdistro=bullseye"}],"aliases":["CVE-2024-45613","GHSA-rgg8-g5x8-wr9v"],"risk_score":3.2,"exploitability":"0.5","weighted_severity":"6.5","resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-usbf-pmfq-1fb6"},{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/11036?format=json","vulnerability_id":"VCID-vj35-jtgq-8qbv","summary":"Cross-site Scripting\nckeditor is an open source WYSIWYG HTML editor with rich content support. A potential vulnerability has been discovered in CKEdit The vulnerability allowed to inject malformed Fake Objects HTML, which could result in executing JavaScript code. It affects all users using the CKEditor 4 plugins listed above at The problem has been recognized and patched.","references":[{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2021-37695","reference_id":"","reference_type":"","scores":[{"value":"0.0074","scoring_system":"epss","scoring_elements":"0.72999","published_at":"2026-04-26T12:55:00Z"},{"value":"0.0074","scoring_system":"epss","scoring_elements":"0.72997","published_at":"2026-04-29T12:55:00Z"},{"value":"0.0074","scoring_system":"epss","scoring_elements":"0.72849","published_at":"2026-04-01T12:55:00Z"},{"value":"0.0074","scoring_system":"epss","scoring_elements":"0.72856","published_at":"2026-04-02T12:55:00Z"},{"value":"0.0074","scoring_system":"epss","scoring_elements":"0.72876","published_at":"2026-04-04T12:55:00Z"},{"value":"0.0074","scoring_system":"epss","scoring_elements":"0.72851","published_at":"2026-04-07T12:55:00Z"},{"value":"0.0074","scoring_system":"epss","scoring_elements":"0.72889","published_at":"2026-04-08T12:55:00Z"},{"value":"0.0074","scoring_system":"epss","scoring_elements":"0.72903","published_at":"2026-04-09T12:55:00Z"},{"value":"0.0074","scoring_system":"epss","scoring_elements":"0.72928","published_at":"2026-04-11T12:55:00Z"},{"value":"0.0074","scoring_system":"epss","scoring_elements":"0.72911","published_at":"2026-04-12T12:55:00Z"},{"value":"0.0074","scoring_system":"epss","scoring_elements":"0.72904","published_at":"2026-04-13T12:55:00Z"},{"value":"0.0074","scoring_system":"epss","scoring_elements":"0.72945","published_at":"2026-04-16T12:55:00Z"},{"value":"0.0074","scoring_system":"epss","scoring_elements":"0.72955","published_at":"2026-04-18T12:55:00Z"},{"value":"0.0074","scoring_system":"epss","scoring_elements":"0.72948","published_at":"2026-04-21T12:55:00Z"},{"value":"0.0074","scoring_system":"epss","scoring_elements":"0.72989","published_at":"2026-04-24T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2021-37695"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-37695","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-37695"},{"reference_url":"https://github.com/ckeditor/ckeditor4","reference_id":"","reference_type":"","scores":[{"value":"7.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/ckeditor/ckeditor4"},{"reference_url":"https://github.com/ckeditor/ckeditor4/commit/de3c001540715f9c3801aaa38a1917de46cfcf58","reference_id":"","reference_type":"","scores":[{"value":"7.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/ckeditor/ckeditor4/commit/de3c001540715f9c3801aaa38a1917de46cfcf58"},{"reference_url":"https://github.com/ckeditor/ckeditor4/security/advisories/GHSA-m94c-37g6-cjhc","reference_id":"","reference_type":"","scores":[{"value":"7.3","scoring_system":"cvssv3","scoring_elements":""},{"value":"7.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N"},{"value":"HIGH","scoring_system":"cvssv3.1_qr","scoring_elements":""},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/ckeditor/ckeditor4/security/advisories/GHSA-m94c-37g6-cjhc"},{"reference_url":"https://lists.debian.org/debian-lts-announce/2021/11/msg00007.html","reference_id":"","reference_type":"","scores":[{"value":"7.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://lists.debian.org/debian-lts-announce/2021/11/msg00007.html"},{"reference_url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NYA354LJP47KCVJMTUO77ZCX3ZK42G3T","reference_id":"","reference_type":"","scores":[{"value":"7.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NYA354LJP47KCVJMTUO77ZCX3ZK42G3T"},{"reference_url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NYA354LJP47KCVJMTUO77ZCX3ZK42G3T/","reference_id":"","reference_type":"","scores":[],"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NYA354LJP47KCVJMTUO77ZCX3ZK42G3T/"},{"reference_url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UVOYN2WKDPLKCNILIGEZM236ABQASLGW","reference_id":"","reference_type":"","scores":[{"value":"7.3","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N"},{"value":"HIGH","scoring_system":"generic_textual","scoring_eleme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Input Validation\nCKEditor4 is an open source what-you-see-is-what-you-get HTML editor. CKEditor4 prior to version 4.18.0 contains a vulnerability in the `dialog` plugin. The vulnerability allows abuse of a dialog input validator regular expression, which can cause a significant performance drop resulting in a browser tab freeze. A patch is available in version 4.18.0. There are currently no known workarounds.","references":[{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2022-24729","reference_id":"","reference_type":"","scores":[{"value":"0.00845","scoring_system":"epss","scoring_elements":"0.74813","published_at":"2026-04-21T12:55:00Z"},{"value":"0.00845","scoring_system":"epss","scoring_elements":"0.74849","published_at":"2026-04-24T12:55:00Z"},{"value":"0.00845","scoring_system":"epss","scoring_elements":"0.74856","published_at":"2026-04-26T12:55:00Z"},{"value":"0.00845","scoring_system":"epss","scoring_elements":"0.7486","published_at":"2026-04-29T12:55:00Z"},{"value":"0.00857","scoring_system":"epss","scoring_elements":"0.74995","published_at":"2026-04-09T12:55:00Z"},{"value":"0.00857","scoring_system":"epss","scoring_elements":"0.75017","published_at":"2026-04-11T12:55:00Z"},{"value":"0.00857","scoring_system":"epss","scoring_elements":"0.74996","published_at":"2026-04-12T12:55:00Z"},{"value":"0.00857","scoring_system":"epss","scoring_elements":"0.74944","published_at":"2026-04-02T12:55:00Z"},{"value":"0.00857","scoring_system":"epss","scoring_elements":"0.75022","published_at":"2026-04-16T12:55:00Z"},{"value":"0.00857","scoring_system":"epss","scoring_elements":"0.75029","published_at":"2026-04-18T12:55:00Z"},{"value":"0.00857","scoring_system":"epss","scoring_elements":"0.74986","published_at":"2026-04-13T12:55:00Z"},{"value":"0.00857","scoring_system":"epss","scoring_elements":"0.74973","published_at":"2026-04-04T12:55:00Z"},{"value":"0.00857","scoring_system":"epss","scoring_elements":"0.74949","published_at":"2026-04-07T12:55:00Z"},{"value":"0.00857","scoring_system":"epss","scoring_elements":"0.74983","published_at":"2026-04-08T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2022-24729"},{"reference_url":"https://ckeditor.com/cke4/release/CKEditor-4.18.0","reference_id":"","reference_type":"","scores":[],"url":"https://ckeditor.com/cke4/release/CKEditor-4.18.0"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-24729","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-24729"},{"reference_url":"https://www.drupal.org/sa-core-2022-005","reference_id":"","reference_type":"","scores":[],"url":"https://www.drupal.org/sa-core-2022-005"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2022-24729","reference_id":"CVE-2022-24729","reference_type":"","scores":[],"url":"https://nvd.nist.gov/vuln/detail/CVE-2022-24729"},{"reference_url":"https://github.com/ckeditor/ckeditor4/security/advisories/GHSA-f6rf-9m92-x2hh","reference_id":"GHSA-f6rf-9m92-x2hh","reference_type":"","scores":[],"url":"https://github.com/ckeditor/ckeditor4/security/advisories/GHSA-f6rf-9m92-x2hh"}],"fixed_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/582225?format=json","purl":"pkg:deb/debian/ckeditor3@0?distro=bullseye","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:deb/debian/ckeditor3@0%3Fdistro=bullseye"},{"url":"http://public2.vulnerablecode.io/api/packages/582226?format=json","purl":"pkg:deb/debian/ckeditor3@3.6.6.1%2Bdfsg-7?distro=bullseye","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:deb/debian/ckeditor3@3.6.6.1%252Bdfsg-7%3Fdistro=bullseye"}],"aliases":["CVE-2022-24729","GHSA-f6rf-9m92-x2hh"],"risk_score":null,"exploitability":"0.5","weighted_severity":"0.0","resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-xhp7-kqdk-tfeu"}],"risk_score":null,"resource_url":"http://public2.vulnerablecode.io/packages/pkg:deb/debian/ckeditor3@3.6.6.1%252Bdfsg-7%3Fdistro=bullseye"}