Description
CKEditor 5 is a JavaScript rich-text editor. Starting in version 40.0.0 and prior to version 43.1.1, a Cross-Site Scripting (XSS) vulnerability is present 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. This vulnerability only affects installations where the Block Toolbar plugin is enabled and either the General HTML Support (with a configuration that permits unsafe markup) or the HTML Embed plugin is also enabled. A fix for the problem is available in version 43.1.1. As a workaround, one may disable the block toolbar plugin.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| ckeditor | ckeditor5 | >= 40.0.0, < 43.1.1 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.04 LTS | request-tracker4 +1 | No fix yet | — |
| Ubuntu 25.10 | request-tracker4 +1 | No fix yet | — |
| Ubuntu 24.04 LTS | ckeditor3 +2 | No fix yet | — |
| Ubuntu 22.04 LTS | ckeditor3 +2 | No fix yet | — |
| Ubuntu 20.04 LTS | ckeditor3 +2 | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | ckeditor3 +1 | No fix yet | — |
| Ubuntu 16.04 LTS | request-tracker4 +1 | No fix yet | — |
| Ubuntu Pro 18.04 LTS | request-tracker4 | No fix yet | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| npm | @ckeditor/ckeditor5-clipboard | >= 40.0.0, < 43.1.1 | 43.1.1 | GHSA-rgg8-g5x8-wr9v |
| npm | ckeditor5 | >= 40.0.0, < 43.1.1 | 43.1.1 | GHSA-rgg8-g5x8-wr9v |
Advisories 3
- NCSC-2025-0131 Kwetsbaarheden verholpen in Oracle JD Edwards NCSC-NL (Netherlands) · Apr 16, 2025
- WID-SEC-2025-0825 Oracle Commerce: Mehrere Schwachstellen BSI CERT-Bund (WID) · Apr 15, 2025
- WID-SEC-2025-0814 Oracle JD Edwards: Mehrere Schwachstellen BSI CERT-Bund (WID) · Apr 15, 2025