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Vulnerability record · CVE-2026-59167 · published 23 September 2026

CVE-2026-59167: Cross-site scripting vulnerability

SunEditor 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.

10.0 CVSS 3.1 Critical EPSS 0.39% · top 69.1% CWE-79 · Cross-site scripting Awaiting Analysis
10.0CVSS 3.1 base score
0.39%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
5References
24 Sep 2026Last modified by NVD

Description

SunEditor 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.

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

References

LinkTags
https://github.com/JiHong88/suneditor/commit/a94ace269c7102bfb6de58a27a6547bc4eb09045
https://github.com/JiHong88/suneditor/issues/1646
https://github.com/JiHong88/suneditor/releases/tag/2.47.11
https://github.com/JiHong88/suneditor/security/advisories/GHSA-6rf4-v2fh-m6p4
https://github.com/JiHong88/suneditor/security/advisories/GHSA-6rf4-v2fh-m6p4

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Source: NIST National Vulnerability Database (record CVE-2026-59167), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.