+44 1865 950 828 Secure Your Business
Actively exploited

CVE-2025-2747 Kentico Xperience CMS Authentication Bypass Using an Alternate Path or Channel Vulnerability

Kentico Xperience CMS contains an authentication bypass using an alternate path or channel vulnerability that could allow an attacker to control administrative objects.

From the CISA KEV catalogue version 2026.11.06, with Cybergen analysis. Updated 6 Nov 2026.

Our Assessment

Should You Worry?

Patch nowCybergen assessment
  • CISA confirmed exploitation in the wild and added it to the Known Exploited Vulnerabilities catalogue on 20 Oct 2025.
  • Rated Critical severity (CVSS 9.8, scored by Vendor).
  • It has been in the catalogue for 382 days. Systems still unpatched now have almost certainly been scanned for it.
The Vulnerability

What It Is

An authentication bypass vulnerability in Kentico Xperience allows authentication bypass via the Staging Sync Server component password handling for the server defined None type. Authentication bypass allows an attacker to control administrative objects.This issue affects Xperience through 13.0.178.

Affected Versions

ProductVersions
Kentico Xperience13.0.178 and earlier

From the public CVE record, as supplied by the vendor. Always confirm against the vendor advisory.

From Watch to Action

What To Do Now

  1. 1

    Find it

    Search your asset inventory and external attack surface for Kentico Xperience CMS. Include cloud images, appliances and anything a supplier runs for you.

    Attack Surface Management
  2. 2

    Fix it

    Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

    Vulnerability Management
  3. 3

    Hunt for compromise

    If an affected system was reachable before you patched, assume it may have been hit. Check logs, new accounts, web shells and outbound connections from the date of exposure.

    Incident Response
  4. 4

    Prove it is fixed

    Rescan or test the system after patching. Upgrades that fail silently and forgotten secondary instances are common.

    Penetration Testing

Vendor Advisories

Regulation

The Compliance Clock

Cyber EssentialsRated critical, so if it affects devices in your Cyber Essentials scope, the update must be installed within 14 days of the vendor releasing it.NIS2If exploitation causes a significant incident, essential and important entities owe their CSIRT an early warning within 24 hours and a notification within 72 hours.DORAFinancial entities must classify ICT incidents and send an initial notification for a major incident within strict deadlines, with exploited flaws a common cause.US federal (BOD 22-01)Federal civilian agencies had until 10 Nov 2025 to remediate. A sensible benchmark for everyone else.

General guidance, not legal advice. Your obligations depend on your sector, scope and jurisdiction.

Stay Ahead

More Exploited Kentico Flaws

Get alerts for KenticoWe email you when a new Kentico vulnerability is confirmed as exploited. Add more vendors on Threat Watch.

By signing up you agree to receive Threat Watch alerts. Unsubscribe at any time. See our Privacy Policy.

CVE-2025-2749Kentico Xperience Path Traversal VulnerabilityAdded 20 Apr 2026CVE-2025-2746Kentico Xperience CMS Authentication Bypass Using an Alternate Path or Channel VulnerabilityAdded 20 Oct 2025CVE-2019-10068Kentico Xperience Deserialization of Untrusted Data VulnerabilityAdded 25 Mar 2022

All 4 exploited Kentico vulnerabilities

Not Sure If You Are Exposed?

Our attack surface and vulnerability teams can check your internet-facing estate for CVE-2025-2747 and every other exploited flaw on the list.

Check My Exposure
Evidence

Sources

  1. CISA Known Exploited Vulnerabilities catalogue
  2. NVD: CVE-2025-2747
  3. CVE record: CVE-2025-2747
  4. FIRST EPSS
  5. devnet.kentico.com/download/hotfixes
  6. labs.watchtowr.com/bypassing-authentication-like-its-the-90s-pre-auth-rce-chain-s-in-kentico-xperien
  7. github.com/watchtowrlabs/kentico-xperience13-AuthBypass-wt-2025-0011
  8. vulncheck.com/advisories/kentico-xperience-staging-sync-server-none-password-type-authentication-byp