PT-2025-31056 · Optimizely · Episerver.Cms.Core+2

F. Beie

+1

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Published

2025-07-28

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Updated

2025-07-29

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CVE-2025-27800

CVSS v4.0

4.8

Medium

VectorAV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
Name of the Vulnerable Software and Affected Versions Episerver CMS versions prior to 11.21.4 and EPiServer.CMS.UI versions prior to 11.37.5 Episerver CMS versions prior to 12.22.1 and EPiServer.CMS.UI versions prior to 11.37.3
Description The Episerver Content Management System (CMS) by Optimizely is affected by multiple Stored Cross-Site Scripting (XSS) vulnerabilities. An authenticated attacker can execute malicious JavaScript code in the victim’s browser. The Admin dashboard allows adding gadgets, including a "Notes" gadget. An attacker with appropriate access rights can insert malicious JavaScript code into these notes, which will be executed when a victim views the dashboard.
Recommendations Update EPiServer.CMS.Core to version 11.21.4 or later. Update EPiServer.CMS.UI to version 11.37.5 or later. Update EPiServer.CMS.Core to version 12.22.1 or later. Update EPiServer.CMS.UI to version 11.37.3 or later.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2025-27800

Affected Products

Episerver.Cms.Core
Episerver.Cms.Ui
Episerver Cms