CVE-2020-36891
Kentico Xperience <= 12.0.49 File Upload Stored XSS
- State
- Published
- Severity
- 5.1 Medium
- Published
- Dec 18, 2025
- Updated
- Dec 30, 2025
- Reserved
- Dec 9, 2025
Description
A stored cross-site scripting vulnerability in Kentico Xperience allows attackers to upload files with spoofed Content-Type that do not match file extensions. Attackers can exploit this vulnerability by uploading malicious files with manipulated MIME types, allowing malicious scripts to execute in users' browsers.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 5.1 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N | VulnCheck |
| 3.1 | 5.4 Medium | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N | VulnCheck |
Weaknesses
- CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Products
| Product | Versions |
|---|---|
XperienceKentico |
|
References
- Kentico DevNet Hotfixesvendor-advisorypatch
- VulnCheck Advisory: Kentico Xperience <= 12.0.49 File Upload Stored XSSthird-party-advisory
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