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Advisory record · GHSA-w93q-cq9w-58p7

SunEditor Embed Plugin has DOM XSS via External Script Element After Iframe Embed

CVSS 8.5 HighEPSS 0.0058 · 48th percentile

Published by the GitHub Advisory Database at 26 Aug 2026, 15:26 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
suneditornpm>=3.0.0, <3.1.43.1.4
Identifiers
GHSA-w93q-cq9w-58p7 · CVE-2026-54606
Weakness (CWE)
CWE-79
Tags
Published
26 Aug 2026
Updated
30 Oct 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

SunEditor's Embed plugin, in npm package suneditor versions from 3.0.0 before 3.1.4, has a DOM-based cross-site scripting flaw. Embed HTML that places a script element with an external src after a valid iframe bypasses the plugin's sanitization and is re-created and appended to the live page. An attacker who can supply or store embed HTML could run JavaScript in another user's browser when that content is opened, previewed, or edited, especially where the application does not sanitize the content on the backend. Upgrade suneditor to 3.1.4, which is the listed fixed version.

Written 31 Oct 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
8.5 High 4.0 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 CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0058, the 48th percentile, on 15 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 13:32 UTC First seen by agentprime
  2. 31 Oct 2026, 13:32 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.