CVE-2023-28439

{"cve": {"data_type": "CVE", "references": {"reference_data": [{"url": "https://ckeditor.com/cke4/addon/iframe", "name": "https://ckeditor.com/cke4/addon/iframe", "tags": [], "refsource": "MISC"}, {"url": "https://ckeditor.com/cke4/addon/embed", "name": "https://ckeditor.com/cke4/addon/embed", "tags": [], "refsource": "MISC"}, {"url": "https://github.com/ckeditor/ckeditor4/security/advisories/GHSA-vh5c-xwqv-cv9g", "name": "https://github.com/ckeditor/ckeditor4/security/advisories/GHSA-vh5c-xwqv-cv9g", "tags": [], "refsource": "MISC"}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "en", "value": "CKEditor4 is an open source what-you-see-is-what-you-get HTML editor. A cross-site scripting vulnerability has been discovered affecting Iframe Dialog and Media Embed packages. The vulnerability may trigger a JavaScript code after fulfilling special conditions: using one of the affected packages on a web page with missing proper Content Security Policy configuration; initializing the editor on an element and using an element other than `<textarea>` as a base; and destroying the editor instance. This vulnerability might affect a small percentage of integrators that depend on dynamic editor initialization/destroy mechanism. A fix is available in CKEditor4 version 4.21.0. In some rare cases, a security fix may be considered a breaking change. Starting from version 4.21.0, the Iframe Dialog plugin applies the `sandbox` attribute by default, which restricts JavaScript code execution in the iframe element. To change this behavior, configure the `config.iframe_attributes` option. Also starting from version 4.21.0, the Media Embed plugin regenerates the entire content of the embed widget by default. To change this behavior, configure the `config.embed_keepOriginalContent` option. Those who choose to enable either of the more permissive options or who cannot upgrade to a patched version should properly configure Content Security Policy to avoid any potential security issues that may arise from embedding iframe elements on their web page."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "CWE-79"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2023-28439", "ASSIGNER": "security-advisories@github.com"}}, "impact": {}, "publishedDate": "2023-03-22T21:15Z", "configurations": {"nodes": [], "CVE_data_version": "4.0"}, "lastModifiedDate": "2023-03-22T21:15Z"}