by Kastro
Paper/Archive/CVE-2026-59167

CVE-2026-59167

JiHong88 suneditor — SunEditor: Critical XSS vulnerability - sanitizer bypass

EPSS 0.5%public exploitCVSS 10.0
critical.is priorityof 100
49
CVSS 10.0 (CNA)10.0 / 10 × 3030.0Not in CISA KEV+300.0EPSS percentile 42.8.428 × 208.6Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
suneditor< 2.47.11–CNA

Scores by source

GitHub_M (CNA)10.0CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CISA ADPSSVCExploitation: poc · Automatable: yes · Technical impact: total

References

exploitgithub.com/JiHong88/suneditor/security/advisories/GHSA-6rf4-v2fh-m6p4refgithub.com/JiHong88/suneditor/issues/1646refgithub.com/JiHong88/suneditor/commit/a94ace269c7102bfb6de58a27a6547bc4eb09045refgithub.com/JiHong88/suneditor/releases/tag/2.47.11