JiHong88 SunEditor up to 3.1.3 Embed plugin embed.js cross site scripting

Summaryinfo

A vulnerability, which was classified as problematic, was found in JiHong88 SunEditor up to 3.1.3. This issue affects some unknown processing of the file src/plugins/modal/embed.js of the component Embed plugin. Such manipulation leads to cross site scripting. This vulnerability is traded as CVE-2026-54606. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in JiHong88 SunEditor up to 3.1.3. Affected by this issue is some unknown functionality of the file src/plugins/modal/embed.js of the component Embed plugin. The manipulation with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to 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. Impacted is integrity. CVE summarizes:

SunEditor is a lightweight and powerful WYSIWYG editor in vanilla JavaScript with no dependencies. Prior to 3.1.4, the SunEditor Embed plugin in src/plugins/modal/embed.js parses attacker-controlled raw embed HTML with DOMParser and processes the resulting DOM nodes. When an external script element follows a valid iframe, the plugin recreates a script element from the attacker-controlled src attribute and appends it to the live DOM, causing JavaScript execution in the editor page. If an application stores or reflects SunEditor content without additional backend sanitization, an attacker who can submit embed HTML can trigger stored or reflected cross-site scripting when another user opens, previews, renders, or edits the content, enabling access to page data and account actions as the victim. This issue is fixed in version 3.1.4.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-54606 since 06/15/2026. The exploitation is known to be easy. The attack may be launched remotely. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1059.007 by the MITRE ATT&CK project.

Upgrading to version 3.1.4 eliminates this vulnerability.

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Productinfo

Vendor

• JiHong88

Name

• SunEditor

Version

• 3.1.0
• 3.1.1
• 3.1.2
• 3.1.3

Website

• Product: https://github.com/JiHong88/suneditor/

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