CVE-2025-27801
BaseFortify
Publication date: 2025-07-28
Last updated on: 2025-11-03
Assigner: SEC Consult Vulnerability Lab
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| optimizely | episerver.cms.core | 12.0 |
| optimizely | episerver.cms.core | 11.0 |
| optimizely | episerver.cms.ui | 11.0 |
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?
This vulnerability involves multiple Stored Cross-Site Scripting (XSS) issues in the Episerver Content Management System (CMS) by Optimizely. Authenticated attackers with at least the 'WebEditor' role could upload SVG files containing malicious JavaScript code via the document upload functionality in the CMS's Edit section. When a user visits the direct URL of the preview image, the malicious script executes in their browser.
How can this vulnerability impact me? :
The vulnerability allows an attacker with WebEditor privileges to execute malicious JavaScript in the browsers of users who view the uploaded SVG preview images. This can lead to unauthorized actions performed on behalf of the user, theft of sensitive information, session hijacking, or other malicious activities within the context of the victim's browser session.