SunEditor: Critical XSS vulnerability - sanitizer bypass

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-59167
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-23 14:17:07 UTC
Updated2026-09-24 15:17:25 UTC
DescriptionSunEditor is a lightweight and powerful WYSIWYG editor in vanilla JavaScript with no dependencies. Prior to 2.47.11, the sanitizer in src/lib/core.js does not consistently reject namespaced or custom HTML elements, allowing event-handler attributes to remain on crafted elements. When an application renders attacker-controlled editor content and a user interacts with the element, the retained handler can execute script in the application's browser origin, enabling stored cross-site scripting, data exposure, or unauthorized browser-context actions. This issue is fixed in version 2.47.11.

Risk And Classification

Primary CVSS: v3.1 10 CRITICAL from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

EPSS: 0.003930000 probability, percentile 0.306570000 (date 2026-09-24)

Problem Types: CWE-79 | CWE-79 CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary10CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
3.1CNADECLARED10CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA JiHong88 Suneditor affected < 2.47.11 Not specified

References

ReferenceSourceLinkTags
github.com/JiHong88/suneditor/issues/1646 [email protected] github.com
github.com/JiHong88/suneditor/releases/tag/2.47.11 [email protected] github.com
github.com/JiHong88/suneditor/commit/a94ace269c7102bfb6de58a27a6547bc4eb... [email protected] github.com
github.com/JiHong88/suneditor/security/advisories/GHSA-6rf4-v2fh-m6p4 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
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