CVE-2024-24815
mediumpriority · track · 24EPSS 0.007 · 53 %ileDEEUUSEPSS · scored 2026-10-26
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.
cvss
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base score 0–10 · higher = more severe · hover a vector to decode
ssvc
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weaknesses
The CWE weakness classes this flaw belongs to.
affected products (8)
Products and version ranges known to be affected.
advisories (2)
Vendor and ecosystem advisories describing this.
- WID-SEC-W-2024-0400Drupal: Schwachstelle ermöglicht Cross-Site ScriptingDeutsch2024-02-14csaf · cert_bundDE
Ein entfernter, authentisierter Angreifer kann eine Schwachstelle in Drupal ausnutzen, um einen Cross-Site Scripting Angriff durchzuführen.
- GHSA-fq6h-4g8v-qqvmCKEditor4 Cross-site Scripting vulnerability caused by incorrect CDATA detection2024-02-07ghsa · osvUS
### Affected packages The vulnerability has been discovered in the core HTML parsing module and may affect all editor instances that: * Enabled [full-page editing](https://ckeditor.com/docs/ckeditor4/latest/features/fullpage.html) mode, * or enabled [CDATA](https://ckeditor.com/docs/ckeditor4/latest/api/CKEDITOR_dtd.html#property-S-cdata) elements in [Advanced Content Filtering](https://ckeditor.com/docs/ckeditor4/latest/guide/dev_advanced_content_filter.html) configuration (defaults to `script` and `style` elements). ### Impact A potential vulnerability has been discovered in CKEditor 4 HTML processing core module. The vulnerability allowed 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. It affects all users using the CKEditor 4 at version < 4.24.0-lts. ### Patches The problem has been recognized and patched. The fix will be available in version 4.24.0-lts. ### For more information Email us at [security@cksource.com](mailto:security@cksource.com) if you have any questions or comments about this advisory. ### Acknowledgements The CKEditor 4 team would like to thank [Michal Frýba](https://cz.linkedin.com/in/michal-fryba) from [ALEF NULA](https://www.alefnula.com/) for recognizing and reporting this vulnerability.
also known as (3)
Other names and identifiers for this entity.
sources
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references (19)
External citations — patches, advisories, analysis.
- https://ckeditor.com/docs/ckeditor4/latest/api/CKEDITOR_dtd.html#property-S-cdatacnnvd
- https://ckeditor.com/docs/ckeditor4/latest/features/fullpage.htmlcnnvd
- https://ckeditor.com/docs/ckeditor4/latest/guide/dev_advanced_content_filter.htmlcnnvd
- https://cxsecurity.com/cveshow/CVE-2024-24815/cnnvd
- https://github.com/ckeditor/ckeditor4/commit/8ed1a3c93d0ae5f49f4ecff5738ab8a2972194cbcnnvd
- https://github.com/ckeditor/ckeditor4/security/advisories/GHSA-fq6h-4g8v-qqvmcnnvd
- https://vigilance.fr/vulnerability/CKEditor-Cross-Site-Scripting-via-Core-HTML-Parsing-Module-43552cnnvd
- https://ckeditor.com/docs/ckeditor4/latest/api/CKEDITOR_dtd.html#property-S-cdataenisa_euvd
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