Stored Cross-Site Scripting Vulnerability in SunEditor by JiHong
CVE-2026-124422

5.3MEDIUM

Key Information:

Vendor

Jihong88

Status
Suneditor
Vendor
CVE Published:
8 November 2026

What is CVE-2026-124422?

SunEditor versions prior to 3.4.0 have a stored cross-site scripting flaw in the html.clean() function. This vulnerability allows attackers to inject malicious HTML via methods like paste, html.set, or html.insert. When users load or paste this content, the crafted scripts can execute in the host page's origin, potentially compromising user data and session integrity. It is crucial for users to update to version 3.4.0 or later to mitigate the risk associated with this vulnerability.

Affected Version(s)

suneditor 3.0.0 < 3.4.0

References

https://github.com/JiHong88/suneditor/security/advisories...
vendor-advisory
https://github.com/JiHong88/suneditor/commit/57db24ac218c...
patch
https://github.com/JiHong88/suneditor/releases/tag/3.4.0
release-notes

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

kemrec
manus-pi
EclipsSec
Zachariah Mithani (AploSec)
.