CVE-2023-28439
A cross-site scripting vulnerability has been discovered affecting Iframe Dialog and Media Embed packages.
Does this matter?
Lower severity and a low EPSS score (0.73%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 3.1
- 6.1 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- EPSS
- 0.73% probability · 52th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-79
- Affected
- ckeditor/ckeditor · fedoraproject/fedora
- Source
- security-advisories@github.com
References
- https://ckeditor.com/cke4/addon/embedProduct
- https://ckeditor.com/cke4/addon/iframeProduct
- https://github.com/ckeditor/ckeditor4/security/advisories/GHSA-vh5c-xwqv-cv9gVendor Advisory
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GWKG2VCPJNETVCDTXU4X6FQ2PO6XCNGN/Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/L4ODGOW6PYVOXHQSMWJBOCE6DXWAI33W/Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VCYKD3JZWWA3ESOZG4PHJJEXT4EYIUIQ/Mailing List
- https://ckeditor.com/cke4/addon/embedProduct
- https://ckeditor.com/cke4/addon/iframeProduct
- https://github.com/ckeditor/ckeditor4/security/advisories/GHSA-vh5c-xwqv-cv9gVendor Advisory
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GWKG2VCPJNETVCDTXU4X6FQ2PO6XCNGN/Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/L4ODGOW6PYVOXHQSMWJBOCE6DXWAI33W/Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VCYKD3JZWWA3ESOZG4PHJJEXT4EYIUIQ/Mailing List
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.