MEDIUM 5.3 NVD
CVE-2026-124422
SunEditor from 3.0.0 before 3.4.0 contains a stored cross-site scripting vulnerability in html.clean() that rebuilds iframes from data-se-iframe-holder-attrs JS
SunEditor from 3.0.0 before 3.4.0 contains a stored cross-site scripting vulnerability in html.clean() that rebuilds iframes from data-se-iframe-holder-attrs JSON without filtering srcdoc or uppercase SRC keys. Attackers can inject crafted HTML through paste, html.set, or html.insert to execute script in the host page origin when victims load or paste the content.
References
- https://github.com/JiHong88/suneditor/blob/3.3.3/src/core/logic/dom/html.js#L336-L350
- https://github.com/JiHong88/suneditor/commit/57db24ac218cd10942fed0bb8288e9cb40b334bb
- https://github.com/JiHong88/suneditor/releases/tag/3.4.0
- https://github.com/JiHong88/suneditor/security/advisories/GHSA-q867-q2hw-f8gp
- https://www.vulncheck.com/advisories/suneditor-3.0.0-before-3.4.0-stored-xss-via-html-clea
This medium severity vulnerability with a CVSS score of 5.3 was published on 2026-11-08 via NVD.
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