CKeditor4 up to 4.20.x Instance Destroying cross site scripting

Summaryinfo

A vulnerability was found in CKeditor4 up to 4.20.x. It has been classified as problematic. Affected by this vulnerability is an unknown functionality of the component Instance Destroying. Performing a manipulation results in cross site scripting. This vulnerability is identified as CVE-2023-28439. The attack can be initiated remotely. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as problematic has been found in CKeditor4 up to 4.20.x. This affects an unknown code block of the component Instance Destroying. The manipulation with an unknown input leads to a cross site scripting 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. The summary by CVE is:

CKEditor4 is an open source what-you-see-is-what-you-get HTML editor. A cross-site scripting vulnerability has been discovered affecting Iframe Dialog and Media Embed packages. The vulnerability may trigger a JavaScript code after fulfilling special conditions: using one of the affected packages on a web page with missing proper Content Security Policy configuration; initializing the editor on an element and using an element other than `` as a base; and destroying the editor instance. This vulnerability might affect a small percentage of integrators that depend on dynamic editor initialization/destroy mechanism. A fix is available in CKEditor4 version 4.21.0. In some rare cases, a security fix may be considered a breaking change. Starting from version 4.21.0, the Iframe Dialog plugin applies the `sandbox` attribute by default, which restricts JavaScript code execution in the iframe element. To change this behavior, configure the `config.iframe_attributes` option. Also starting from version 4.21.0, the Media Embed plugin regenerates the entire content of the embed widget by default. To change this behavior, configure the `config.embed_keepOriginalContent` option. Those who choose to enable either of the more permissive options or who cannot upgrade to a patched version should properly configure Content Security Policy to avoid any potential security issues that may arise from embedding iframe elements on their web page.

The weakness was released 03/23/2023 as GHSA-vh5c-xwqv-cv9g. The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2023-28439 since 03/15/2023. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 209246 (Oracle Siebel CRM <= 24.7 (October 2024 CPU)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.21.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (209246). Several companies clearly confirm that VulDB is the primary source for best 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

CPE 2.3info

• 🔍
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CPE 2.2info

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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