CVE-2020-36891
BaseFortify
Publication date: 2025-12-18
Last updated on: 2025-12-27
Assigner: VulnCheck
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| kentico | xperience | to 12.0.49 (inc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-79 | The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
CVE-2020-36891 is a stored cross-site scripting (XSS) vulnerability in Kentico Xperience up to version 12.0.49. It occurs because the system improperly neutralizes input during web page generation. Attackers can upload files with spoofed Content-Type headers that do not match the actual file extensions. This allows malicious scripts embedded in these files to execute in users' browsers, leading to stored XSS attacks. [1]
How can this vulnerability impact me? :
This vulnerability can allow attackers to execute malicious scripts in the browsers of users who view the affected content. This can lead to unauthorized actions such as stealing user credentials, session hijacking, or performing actions on behalf of the user. The impact is rated as medium severity with low confidentiality and integrity impacts, but it requires user interaction and some privileges to exploit. [1]
What immediate steps should I take to mitigate this vulnerability?
Apply the hotfix available from Kentico DevNet that addresses this vulnerability in Kentico Xperience versions up to and including 12.0.49. This update fixes the issue with improper neutralization of input and prevents attackers from exploiting the stored XSS via spoofed Content-Type file uploads. [1]