Description
CKEditor4 is an open source what-you-see-is-what-you-get HTML editor. A vulnerability has been discovered in the core HTML processing module and may affect all plugins used by CKEditor 4 prior to version 4.18.0. The vulnerability allows someone to inject malformed HTML bypassing content sanitization, which could result in executing JavaScript code. This problem has been patched in version 4.18.0. There are currently no known workarounds.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| ckeditor | ckeditor4 | < 4.18.0 | — |
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.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 12 | ckeditor | 4.19.0+dfsg-1 | — |
| Debian 12 | ckeditor3 | No fix yet | — |
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 7 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 24.04 LTS | ckeditor | 4.22.1+dfsg1-2ubuntu0.24.04.1~esm1 | USN-7258-1 |
| Ubuntu Pro 22.04 LTS | ckeditor | 4.16.2+dfsg-1ubuntu0.1~esm1 | USN-7258-1 |
| Ubuntu Pro 20.04 LTS | ckeditor | 4.12.1+dfsg-1ubuntu0.1+esm1 | USN-7258-1 |
| Ubuntu Pro 18.04 LTS | ckeditor | 4.5.7+dfsg-2ubuntu0.18.04.1+esm1 | USN-7258-1 |
| Ubuntu Pro 18.04 LTS | request-tracker4 | No fix yet | — |
| Ubuntu Pro 16.04 LTS | ckeditor | 4.5.7+dfsg-2ubuntu0.16.04.1~esm2 | USN-7258-1 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| npm | ckeditor4 | < 4.18.0 | 4.18.0 | GHSA-4fc4-4p5g-6w89 |
| Packagist | drupal/core | >= 8.0.0, < 9.2.15 · >= 9.3.0, < 9.3.8 | 9.2.15, 9.3.8 | DRUPAL-CORE-2022-005 |
Advisories 1
- USN-7258-1 ckeditor vulnerabilities Ubuntu Security Notices (USN) · Jun 25, 2026
References
- https://github.com/ckeditor/ckeditor4/security/advisories/GHSA-4fc4-4p5g-6w89
- https://github.com/ckeditor/ckeditor4/commit/d158413449692d920a778503502dcb22881bc949
- https://ckeditor.com/cke4/release/CKEditor-4.18.0
- https://www.oracle.com/security-alerts/cpujul2022.html
- https://www.drupal.org/sa-core-2022-005
- FEDORA-2022-b61dfd219b vendor-advisory
- FEDORA-2022-4c634ee466 vendor-advisory