CVE-2026-124491 (GCVE-0-2026-124491)
Vulnerability from cvelistv5 – Published: 2026-11-08 13:16 – Updated: 2026-11-09 14:18
VLAI
EPSS
VEX
Title
SunEditor before 3.4.0 Stored XSS via FileUpload Plugin Filename
Summary
SunEditor before 3.4.0 contains a stored cross-site scripting vulnerability in the FileUpload plugin create() method that assigns server-returned file names to innerHTML without escaping. Attackers can upload files with HTML-laden names that bypass html.clean() and execute JavaScript in victims' browsers when content or gallery items load, enabling session theft.
Severity
6.4 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-09 14:17 UTC
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
VulnCheck
CNA
References
2 references
| URL | Tags |
|---|---|
| https://github.com/JiHong88/suneditor/security/ad… | vendor-advisory |
| https://www.vulncheck.com/advisories/suneditor-be… | third-party-advisory |
Impacted products
Date Public
2026-10-23 00:00
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Nomenclature
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Browse all ATT&CK techniques and the vulnerabilities related to each.
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