CVE-2020-36891 | THREATINT

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.

PUBLISHED Reserved 2025-12-09 | Published 2025-12-18 | Updated 2025-12-30 | Assigner VulnCheck

MEDIUM: 5.1CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

MEDIUM: 5.4CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Problem types

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Product status

Any version

affected

Credits

Ataberk Yavuzer finder

References

devnet.kentico.com/download/hotfixes (Kentico DevNet Hotfixes) vendor-advisory patch

www.vulncheck.com/...entico-xperience-file-upload-stored-xss (VulnCheck Advisory: Kentico Xperience <= 12.0.49 File Upload Stored XSS) third-party-advisory

cve.org (CVE-2020-36891)

nvd.nist.gov (CVE-2020-36891)

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