CKEditor4 is an open source what-you-see-is-what-you-get HTML editor. A theoretical vulnerability has been identified in CKEditor 4.22 (and above). In a highly unlikely scenario where an attacker gains control over the https://cke4.ckeditor.com domain, they could potentially execute an attack on CKEditor 4 instances. The issue impacts only editor instances with enabled version notifications. Please note that this feature is disabled by default in all CKEditor 4 LTS versions. Therefore, if you use CKEditor 4 LTS, it is highly unlikely that you are affected by this vulnerability. If you are unsure, please contact us. The fix is available in version 4.25.0-lts.

GitHub, Inc. AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:L/A:N

GitHub, Inc. CWE-79

GitHub, Inc. https://github.com/ckeditor/ckeditor4/commit/b5069c9cb769ea22eae1cbd7200f22b1cf2e3a7f [No types assigned]

GitHub, Inc. https://github.com/ckeditor/ckeditor4/security/advisories/GHSA-6v96-m24v-f58j [No types assigned]