Kentico Xperience CMS Authentication Bypass (CVE-2025-2747)

Historical catalog analysis: CISA added this entry on October 20, 2025. The entry reflects catalog information retrieved on August 31, 2026, not a snapshot archived on the inclusion date. Check current vendor guidance before acting.

What the vulnerability is

CVE-2025-2747 is an authentication bypass vulnerability (CWE-288) affecting Kentico Xperience CMS. The flaw involves the use of an alternate path or channel to circumvent standard authentication mechanisms. If successfully exploited, this could allow an attacker to gain control over administrative objects within the system.

Exposure and applicability

This vulnerability applies to organizations deploying Kentico Xperience CMS. Because the flaw allows for the bypass of authentication to reach administrative functions, any instance of the software exposed to untrusted networks is at risk of unauthorized administrative access. Infrastructure owners should identify all active deployments of this CMS to determine their exposure level.

Remediation priorities

Based on the reported vulnerability, our analysis suggests the following prioritization for remediation:

1. Immediate Patching: The primary corrective action is the application of vendor-supplied hotfixes. Organizations should prioritize assets that are internet-facing or hold sensitive administrative data.
2. Access Restriction: While patching is underway, restricting access to the CMS administrative interface to known, trusted IP addresses could reduce the likelihood of external exploitation.
3. Inventory Audit: Ensure all instances of Kentico Xperience CMS across the environment are accounted for to prevent “shadow IT” deployments from remaining unpatched.

How to validate remediation

Verification must go beyond confirming a version number or the presence of a patch file. To assure that exposure has been reduced, defenders should:

• Verify Hotfix Application: Confirm through system logs or vendor-provided tools that the specific hotfix for CVE-2025-2747 is active and running in the production environment.
• Test Authentication Boundaries: Using an authorized testing environment, attempt to access administrative objects via non-standard paths to ensure the bypass is no longer functional.
• Configuration Audit: Review network ACLs and firewall rules to verify that administrative channels are restricted to authorized personnel only.

Limits and open questions

Applying a hotfix reduces the likelihood of this specific exploit but does not guarantee total immunity from other authentication flaws. It remains unknown whether this vulnerability has been utilized in ransomware campaigns. Additionally, while CISA has set a remediation deadline of November 10, 2025, for federal agencies, non-federal organizations must determine their own urgency based on their specific risk profile and asset exposure.

Source and editorial note

CVE-2025-2747: Kentico Xperience CMS Authentication Bypass Using an Alternate Path or Channel Vulnerability · Source date: October 20, 2025 · Retrieved August 31, 2026.

Material facts are tied to the cited primary source. Recommendations are independent defensive analysis unless attributed to the source. Confirm consequential decisions against current authoritative guidance.

Archive date: October 23, 2025. The displayed post date is assigned three days after the source date to organize this retrospective archive; it does not mean this site published the analysis then. First published by this site: September 30, 2026 at 00:40 UTC.

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