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.

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction Passive

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact Low

Subsequent System Integrity Impact Low

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable no

Technical Impact partial

Affected Vendors & Products

Vendors Products
Kentico Subscribe
Xperience Subscribe

No data.

No data.

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://devnet.kentico.com/download/hotfixes cve-icon cve-icon
https://www.vulncheck.com/advisories/kentico-xperience-file-upload-stored-xss cve-icon cve-icon
History

Thu, 18 Dec 2025 22:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Thu, 18 Dec 2025 20:00:00 +0000

Type Values Removed Values Added
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.
Title Kentico Xperience <= 12.0.49 File Upload Stored XSS
First Time appeared Kentico
Kentico xperience
Weaknesses CWE-79
CPEs cpe:2.3:a:kentico:xperience:*:*:*:*:*:*:*:*
Vendors & Products Kentico
Kentico xperience
References
Metrics cvssV3_1

{'score': 4.6, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N'}

cvssV4_0

{'score': 5.1, 'vector': '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'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2025-12-18T21:48:14.482Z

Reserved: 2025-12-09T11:05:19.896Z

Link: CVE-2020-36891

cve-icon Vulnrichment

Updated: 2025-12-18T21:09:00.634Z

cve-icon NVD

Status : Received

Published: 2025-12-18T20:15:49.490

Modified: 2025-12-18T20:15:49.490

Link: CVE-2020-36891

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses