SunEditor before 3.4.0 contains a stored cross-site scripting vulnerability in the DocumentType constructor that injects header textContent into innerHTML without HTML escaping. Attackers can store entity-encoded HTML in h1-h6 headers that executes JavaScript when editors using document:header mode initialize, enabling session cookie theft.
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History
Sun, 08 Nov 2026 13:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | SunEditor before 3.4.0 contains a stored cross-site scripting vulnerability in the DocumentType constructor that injects header textContent into innerHTML without HTML escaping. Attackers can store entity-encoded HTML in h1-h6 headers that executes JavaScript when editors using document:header mode initialize, enabling session cookie theft. | |
| Title | SunEditor before 3.4.0 Stored XSS via DocumentType Header textContent | |
| Weaknesses | CWE-79 | |
| References |
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| Metrics |
cvssV4_0
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MITRE
Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-11-08T13:16:09.204Z
Reserved: 2026-11-08T02:21:16.290Z
Link: CVE-2026-124493
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OpenCVE Enrichment
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Weaknesses