CVE-2024-24815: ckeditor XSS — Fix

Description

CKEditor4 is an open source what-you-see-is-what-you-get HTML editor. A cross-site scripting vulnerability has been discovered in the core HTML parsing module in versions of CKEditor4 prior to 4.24.0-lts. It may affect all editor instances that enabled full-page editing mode or enabled CDATA elements in Advanced Content Filtering configuration (defaults to `script` and `style` elements). The vulnerability allows attackers to inject malformed HTML content bypassing Advanced Content Filtering mechanism, which could result in executing JavaScript code. An attacker could abuse faulty CDATA content detection and use it to prepare an intentional attack on the editor. A fix is available in version 4.24.0-lts.

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CVSS v3.1 Score

6.1

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Weakness Type (CWE)

CWE-79 Cross-site Scripting (XSS)

Affected Products

Vendor	Product	Versions
ckeditor	ckeditor	4.0 — 4.24.0

References

Advisories & Patches

https://github.com/ckeditor/ckeditor4/commit/8ed1a3c93d0ae5f49f4ecff5738ab8a2972194cb https://github.com/ckeditor/ckeditor4/security/advisories/GHSA-fq6h-4g8v-qqvm https://github.com/ckeditor/ckeditor4/commit/8ed1a3c93d0ae5f49f4ecff5738ab8a2972194cb https://github.com/ckeditor/ckeditor4/security/advisories/GHSA-fq6h-4g8v-qqvm

Other References

https://ckeditor.com/docs/ckeditor4/latest/api/CKEDITOR_dtd.html#property-S-cdata https://ckeditor.com/docs/ckeditor4/latest/features/fullpage.html https://ckeditor.com/docs/ckeditor4/latest/guide/dev_advanced_content_filter.html https://www.drupal.org/sa-contrib-2024-009 https://ckeditor.com/docs/ckeditor4/latest/api/CKEDITOR_dtd.html#property-S-cdata https://ckeditor.com/docs/ckeditor4/latest/features/fullpage.html https://ckeditor.com/docs/ckeditor4/latest/guide/dev_advanced_content_filter.html https://www.drupal.org/sa-contrib-2024-009

Frequently Asked Questions

What is CVE-2024-24815? +

CKEditor4 is an open source what-you-see-is-what-you-get HTML editor. A cross-site scripting vulnerability has been discovered in the core HTML parsing module in versions of CKEditor4 prior to 4.24.0-lts. It may affect all editor instances that enabled full-page editing mode or enabled CDATA elements in Advanced Content Filtering configuration (defaults to `script` and `style` elements). The vulnerability allows attackers to inject malformed HTML content bypassing Advanced Content Filtering mechanism, which could result in executing JavaScript code. An attacker could abuse faulty CDATA content detection and use it to prepare an intentional attack on the editor. A fix is available in version 4.24.0-lts. It has a CVSS v3.1 base score of 6.1 (MEDIUM).

How severe is CVE-2024-24815? +

CVE-2024-24815 has a CVSS v3.1 score of 6.1 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2024-24815? +

CVE-2024-24815 affects products from ckeditor, specifically: ckeditor. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-24815? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2024-24815