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NVD Vulnerability Details :

CVE-2025-27801

Awaiting Analysis

Source-551230f0-3615-47bd-b7cc-93e92e730bbf

Published At-28 Jul, 2025 | 09:15

Updated At-29 Jul, 2025 | 14:14

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. ContentReference properties, which could be used in the "Edit" section of the CMS, offered an upload functionality for documents. These documents could later be used as displayed content on the page. It was possible to upload SVG files that include malicious JavaScript code that would be executed if a user visited the direct URL of the preview image. 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)

Date Added	Due Date	Vulnerability Name	Required Action
	N/A

Metrics

Type	Version	Base score	Base severity	Vector
Secondary	4.0	4.6	MEDIUM	CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:N/VI:L/VA:L/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Secondary	3.1	4.8	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

Weaknesses

CWE ID	Type	Source
CWE-79	Secondary	551230f0-3615-47bd-b7cc-93e92e730bbf

References

Hyperlink	Source	Resource
https://api.nuget.optimizely.com/packages/episerver.cms.core/11.21.4#	551230f0-3615-47bd-b7cc-93e92e730bbf	N/A
https://api.nuget.optimizely.com/packages/episerver.cms.core/12.22.1#	551230f0-3615-47bd-b7cc-93e92e730bbf	N/A
https://r.sec-consult.com/optimizely	551230f0-3615-47bd-b7cc-93e92e730bbf	N/A

CISA Catalog

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Change History