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Advisories

SunEditor 3.0.0 before 3.4.0 Stored XSS via html.clean() Iframe Placeholder

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Severity
medium
Date
Affecting

  • suneditor >= 3.0.0, < 3.4.0

CWE
  • CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVSS
5.3
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
Credit
kemrec, manus-pi, EclipsSec, Zachariah Mithani (AploSec)
Description
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.

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