A critical access control bypass vulnerability in Kentico Xperience allows high-privileged users to escalate their permissions and compromise global administrator accounts.

This vulnerability is caused by a missing authorization check (CWE-862) that allows an attacker with existing administrator privileges to modify global account settings. By manipulating user privilege levels, an attacker can gain unauthorized control over administrative accounts and invalidate security-sensitive macros.

Successful exploitation of this flaw poses a severe risk to organizational integrity, as it grants attackers the ability to manipulate global administrator privileges. With a CVSS score of 7.2, this high-severity vulnerability could lead to total account compromise, unauthorized data access, and the potential for persistent backdoors within the content management environment.

Immediate Action: Upgrade to a patched release of Kentico Xperience as specified by the vendor security advisory. Organizations should consult the Kentico hotfix portal to identify the specific version required to remediate this flaw.

Proactive Monitoring: Security teams should review application access logs for anomalous requests originating from administrative accounts that involve modification of user privilege structures.

Compensating Controls: Implement strict network segmentation and restrict access to the administrative interface to known, trusted IP addresses to limit the potential attack surface.

Public Exploit Available: No — there is no confirmed public exploit available in the provided data.

Given the potential for complete administrative account takeover, this vulnerability must be addressed with high priority. Administrators should verify their current deployment versions against the affected range and apply the necessary hotfixes immediately to prevent unauthorized privilege escalation and ensure the integrity of the Kentico Xperience environment.