CVE-2025-27802 (GCVE-0-2025-27802)
Vulnerability from cvelistv5 – Published: 2025-07-28 08:47 – Updated: 2025-11-03 19:46
VLAI
EPSS
VEX
Title
Stored Cross-Site Scripting in Episerver Content Management System (CMS) Edit Preview
Summary
The Episerver Content Management System (CMS) by Optimizely was affected by multiple Stored Cross-Site Scripting (XSS) vulnerabilities. This allowed an authenticated attacker to execute malicious JavaScript code in the victim's browser.
RTE properties (text fields), which could be used in the "Edit" section of the CMS,
allowed the input of arbitrary text. It was possible to input malicious JavaScript
code in these properties that would be executed if a user visits the previewed
page. Attackers needed at least the role "WebEditor" in order to exploit this issue.
Affected products: Version 11.X: EPiServer.CMS.Core (<11.21.4) with EPiServer.CMS.UI (<11.37.5), Version 12.X: EPiServer.CMS.Core (<12.22.1) with EPiServer.CMS.UI (<11.37.3)
Severity
4.8 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-07-28 15:33 UTC
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')
Assigner
SEC-VLab
CNA
References
4 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Optimizely | Episerver Content Management System (CMS) |
Affected:
11.x , < 11.21.4
(custom)
Affected: 12.x , < 12.22.1 (custom) |
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