CVE-2026-54606Public exploitNetwork attack vector

DOM XSS via recreated external script elements

Published Aug 26, 2026 · Updated Aug 26, 2026

DOM-based XSS in the SunEditor Embed plugin before 3.1.4 allows remote authenticated users to execute JavaScript through crafted embed HTML. The plugin parses raw embed HTML, recreates a script element from an attacker-controlled src after a valid iframe, and appends it to the live DOM. Exploitation requires the Embed plugin, permission to submit embed HTML, and another user to open or render unsanitized content, exposing page data and victim-authorized actions.

CVSS severity8.5
High
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

DOM-based XSS in the SunEditor Embed plugin before 3.1.4 allows remote authenticated users to execute JavaScript through crafted embed HTML. The plugin parses raw embed HTML, recreates a script element from an attacker-controlled src after a valid iframe, and appends it to the live DOM. Exploitation requires the Embed plugin, permission to submit embed HTML, and another user to open or render unsanitized content, exposing page data and victim-authorized actions.

The record

CVE
CVE-2026-54606
Published
Aug 26, 2026
Updated
Aug 26, 2026
Vendor
JiHong88
Product
SunEditor
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 26, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 3.1.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

JiHong88 · SunEditorversion=< 3.1.4

Published CVSS scores

8.5GitHub Advisory DatabaseCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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