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Kentico CMS Reflected Cross-Site Scripting Vulnerability

Vulnerability

A reflected cross-site scripting vulnerability has been identified in Kentico CMS version 7. This issue arises from the improper neutralization of input in the '/CMSMessages/AccessDenied.aspx' endpoint, allowing attackers to manipulate specific GET request parameters. Support for Kentico CMS version 7 ended in 2016, and version 8 does not exhibit this vulnerability.

Impact

Exploitation of this vulnerability allows for reflected cross-site scripting, where an attacker can inject malicious scripts that are executed in the context of the user's browser.

Remediation

Users are advised to upgrade to a newer version of Kentico CMS, as support for version 7 has ended.

Added: Jun 9, 2025, 7:46 PM
Updated: Jun 9, 2025, 7:46 PM

Vulnerability Rating

Custom Algorithm
spread
5.2
impact
1.7
exploitability
6.5
remediation
7.7
relevance
0.0
threat
0.0
urgency
2.9
incentive
1.7

Our algorithm analyzes dozens of metrics to generate these 8 key vulnerability categories, which are then combined to calculate the overall risk score.