High 8.5Published Aug 26, 2026

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

Updated under an hour ago (2026-10-19 09:50 UTC)

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It affects JiHong88 suneditor. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for JiHong88 suneditor

Exploited in the last 30 days

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.

CVSS: 8.5 HIGH (v4.0, CNA)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
Weakness (CWE): CWE-79
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Aug 26, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

JiHong88 suneditor jihong88:suneditor (from the name)	before 3.1.4	CNA record

References

https://github.com/JiHong88/suneditor/security/advisories/GHSA-w93q-cq9w-58p7x-refsource-confirm
https://github.com/JiHong88/suneditor/issues/1649x-refsource-misc
https://github.com/JiHong88/suneditor/commit/9d43a5e082101d2d6475cba86e0d58d7c2cf6677x-refsource-misc
https://github.com/JiHong88/suneditor/releases/tag/3.1.4x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.