CVE-2026-124492

SunEditor before 3.4.0 Stored XSS via Link Modal Bookmark List

Published Nov 8, 2026 CVSS 4.0 · 8.3 High EPSS < 1% KEV · Not listed
Description
SunEditor before 3.4.0 contains a stored cross-site scripting vulnerability in ModalAnchorEditor's #createBookmarkList, which inserts entity-decoded h1-h6 header textContent into the bookmark list via innerHTML without escaping. Attackers can store HTML-encoded payloads in editor headers that execute JavaScript when a victim opens the link modal and types # in the URL input.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Jihong88
Jihong88 suneditor
Vendors & Products Jihong88
Jihong88 suneditor
Type Values Removed Values Added
Description SunEditor before 3.4.0 contains a stored cross-site scripting vulnerability in ModalAnchorEditor's #createBookmarkList, which inserts entity-decoded h1-h6 header textContent into the bookmark list via innerHTML without escaping. Attackers can store HTML-encoded payloads in editor headers that execute JavaScript when a victim opens the link modal and types # in the URL input.
Title SunEditor before 3.4.0 Stored XSS via Link Modal Bookmark List
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 7.6, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N'}

cvssV4_0

{'score': 8.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Nov 13, 2026, 3:32 AM
Reserved
Nov 8, 2026, 2:21 AM
Status
Deferred
Published
Nov 8, 2026, 2:18 PM
Modified
Nov 13, 2026, 4:17 AM