Medium

SCEditor has DOM XSS via emoticon URL/HTML injection

Disclosed: 06.02.2026
Updated: 11.10.2026 10:22

If an attacker has the ability control configuration options passed to sceditor.create(), like emoticons, charset, etc. then it's possible for them to trigger an XSS attack due to lack of sanitisation of configuration options.

Proof of concept:

sceditor.create(textarea, {
  emoticons: {
    dropdown: { ':)': { url: 'x" onerror="window.__xss = true' } }
  }
});

Affected software

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Platform	Package	Vulnerable versions	Fixed in
npm package	sceditor	< 3.2.1	3.2.1

References

CVSS score 5.4/10

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Weakness (CWE): CWE-79
Platform: npm
Package: sceditor
Disclosed: 06.02.2026
Updated: 11.10.2026 10:22

Sources and licenses

OSV / GitHub Advisory Database - GHSA-25fq-6qgg-qpj8 - CC BY 4.0

Vulnerability history: sceditor

All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.

This is the only known vulnerability of this package.

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