Is CVE-2025-2746 (Kentico Xperience CMS Authentication Bypass Using an Alternate Path or Channel) being exploited in the wild?

What “exploited in the wild” means for CVE-2025-2746

For this CVE, the practical answer is not just that a flaw exists, but that CISA has already placed it in KEV, which is a strong operational signal that defenders should treat exposure as active and urgent. In practice, that means the first question is whether any Kentico Xperience CMS instance is reachable, internet-exposed, or still running the affected authentication path in production.

Use the vendor advisory and the CISA Known Exploited Vulnerabilities Catalog for authoritative remediation timing and version details. If you need a broader triage pattern for actively exploited flaws, NHIMG’s Zero-Day and Exploited Vulnerabilities Guide is the right operational lens because it focuses on KEV, emergency mitigation, and post-patch hunting.

The key point is that “exploited in the wild” changes response priority. You should assume the vulnerability can be used quickly and at scale, even if you have not yet seen obvious alerts. That is why KEV-listed issues demand exposure confirmation, compensating controls if patching is delayed, and verification that no attacker activity occurred before the fix.

What to verify before you assume you are safe

Start by confirming whether any instance of Kentico Xperience CMS exists in your asset inventory, including hosted, legacy, and externally managed deployments. Then check whether administrative access, alternate paths, or channels are exposed in a way that would let an attacker reach the bypass condition described by the CVE. If the product is present, do not rely on “we have not seen abuse” as evidence of safety.

For fast prioritisation, pair exposure checks with exploitability context from NIST National Vulnerability Database and the FIRST EPSS service, while treating KEV as the higher-priority signal when the issue is already confirmed exploited. In operational terms, KEV tells you to act; NVD and EPSS help you size the queue and focus scarce patching capacity.

If the affected site hosts administrative functions, look beyond the public URL and check reverse proxies, alternate hostnames, admin subpaths, and any integration points that may expose the same control surface through a different route. Bypass flaws often succeed because teams validate one entry path but miss another that reaches the same privilege boundary.

How to respond if patching cannot happen immediately

When patching must wait, the right move is to reduce reachability and limit what the vulnerable path can control. That may include restricting access to administrative interfaces, tightening network exposure, disabling unnecessary routes, and placing stronger monitoring around login and admin-object activity. Because this is an authentication bypass, compensating controls should focus on blocking the attacker’s ability to reach the privileged workflow, not just on generic scanning.

If you need control guidance for authentication and access-hardening decisions, NIST SP 800-53 Rev 5 Security and Privacy Controls supports the underlying access-control and authentication discipline, while NIST SP 800-63 Digital Identity Guidelines is useful when you are reviewing whether administrative access is still using weak or easily bypassed sign-in patterns.

Do not postpone mitigation because the exploit does not obviously expose credentials. An authentication bypass can still let an attacker manipulate administrative objects, change site behaviour, or create the conditions for later persistence. If you can only partially mitigate, prefer measures that reduce attacker reach and preserve logging over changes that are cosmetically tidy but leave the bypass path intact.

Risk and Threat Considerations

Because the flaw affects authentication, the main threat is not just unauthorised entry, but unauthorised administrative control. That can turn a single bypass into content tampering, configuration changes, new admin creation, or a stepping stone to broader compromise if the CMS is connected to internal systems or privileged integrations.

Failure mechanism: An attacker uses an alternate path or channel to skip normal authentication checks and reach administrative functionality that should have been protected.

Impact: The attacker may control administrative objects, alter site behaviour, plant persistence, or use the CMS as a launch point for further compromise.

Practitioner Guidance

What to prioritise: Treat any internet-facing Kentico Xperience instance as a candidate for immediate investigation, not routine backlog work. If the asset is business-critical, confirm exposure and containment before you debate remediation windows.

What to verify: Validate whether the vulnerable access path is reachable through alternate routes, not only through the primary login screen. Then check logs for administrative actions, unexpected object changes, new accounts, or sign-ins that do not fit normal operator behaviour.

Common mistake: Teams often look for credential theft indicators first and miss the fact that the bypass may never require stolen credentials at all. For this class of flaw, the absence of password compromise does not reduce the need to assess administrative abuse.

Practitioner takeaway: Once CISA puts a CVE in KEV, the question shifts from “is it exploitable?” to “where is it still reachable, and what could an attacker do if they reach it?”

Related resources from NHI Mgmt Group

• Is CVE-2025-2747 (Kentico Xperience CMS Authentication Bypass Using an Alternate Path or Channel) being exploited in the wild?
• How do you patch or mitigate CVE-2025-2746 (Kentico Xperience CMS Authentication Bypass Using an Alternate Path or Channel)?
• CVE-2025-2746 (Kentico Xperience CMS Authentication Bypass Using an Alternate Path or Channel)
• CVE-2025-2747 (Kentico Xperience CMS Authentication Bypass Using an Alternate Path or Channel)