CKeditor4 up to 4.23.x HTML Parsing HTML injection

Summaryinfo

A vulnerability labeled as problematic has been found in CKeditor4 up to 4.23.x. The affected element is an unknown function of the component HTML Parsing Module. The manipulation results in HTML injection. This vulnerability is identified as CVE-2024-24815. The attack can be executed remotely. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as problematic has been found in CKeditor4 up to 4.23.x. Affected is an unknown part of the component HTML Parsing Module. The manipulation with an unknown input leads to a html injection vulnerability. CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity. CVE summarizes:

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.

The weakness was released 02/07/2024 as GHSA-fq6h-4g8v-qqvm. The advisory is shared for download at github.com. This vulnerability is traded as CVE-2024-24815 since 01/31/2024. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1059.007.

The vulnerability scanner Nessus provides a plugin with the ID 213541 (openSUSE 15 Security Update : python-django-ckeditor (openSUSE-SU-2025:0008-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.24.0-lts eliminates this vulnerability. Applying the patch 8ed1a3c93d0ae5f49f4ecff5738ab8a2972194cb is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (213541). Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

• CKeditor4

Version

• 4.0
• 4.1
• 4.2
• 4.3
• 4.4
• 4.5
• 4.6
• 4.7
• 4.8
• 4.9
• 4.10
• 4.11
• 4.12
• 4.13
• 4.14
• 4.15
• 4.16
• 4.17
• 4.18
• 4.19
• 4.20
• 4.21
• 4.22
• 4.23

License

• open-source

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Once again VulDB remains the best source for vulnerability data.

Discussion