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CVE-2026-54606— SunEditor: DOM XSS in SunEditor Embed Plugin via External Script Element After Iframe Embed

Quick assessment

Affected
JiHong88 suneditor
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Yi JiHong SunEditor是Yi JiHong个人开发者的一款网页富文本编辑器。 Yi JiHong SunEditor 3.1.4之前版本存在安全漏洞，该漏洞源于SunEditor Embed插件解析攻击者控制的embed HTML时未进行充分验证，可能允许攻击者执行JavaScript，导致存储型或反射型跨站脚本攻击。

CVSS 8.5 · High EPSS 0.58% · P48

Affected Version Matrix 1

VendorProduct Version RangeStatus
JiHong88 suneditor < 3.1.4 affected
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I. Basic Information for CVE-2026-54606

Vulnerability Information
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Vulnerability Title
SunEditor: DOM XSS in SunEditor Embed Plugin via External Script Element After Iframe Embed
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
Yi JiHong SunEditor 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Yi JiHong SunEditor是Yi JiHong个人开发者的一款网页富文本编辑器。 Yi JiHong SunEditor 3.1.4之前版本存在安全漏洞，该漏洞源于SunEditor Embed插件解析攻击者控制的embed HTML时未进行充分验证，可能允许攻击者执行JavaScript，导致存储型或反射型跨站脚本攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
JiHong88 suneditor < 3.1.4 -

II. Public POCs for CVE-2026-54606

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III. Intelligence Information for CVE-2026-54606

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Patches & Fixes for CVE-2026-54606 (1)

Vendor Advisories for CVE-2026-54606 (1)

Vendor Pages for CVE-2026-54606 (1)

Other References for CVE-2026-54606 (1)

IV. Related Vulnerabilities

Same product: suneditor
Same vendor: JiHong88
Same weakness: CWE-79