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Actively exploited in the wild. This CVE is on the CISA Known Exploited Vulnerabilities list — treat remediation as urgent. Federal remediation due by 10 Nov 2025.
XperienceApplication · Kentico

CVE-2025-2746

CRITICAL · 9.8 CVSS v3.1 Published 2025-03-24
Fix available
A fix is available. Upgrade to after 13.0.172 or later.
See remediation →
100/100
Remediation priority · Urgent
In the wild High EPSS Public exploit Remotely reachable No privileges Zero-click Patch available

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
An authentication bypass vulnerability in Kentico Xperience allows authentication bypass via the Staging Sync Server password handling of empty SHA1 usernames in digest authentication. Authentication bypass allows an attacker to control administrative objects.This issue affects Xperience through 13.0.172.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · moderate confidence

Kentico Xperience contains an authentication bypass vulnerability in the Staging Sync Server module. The flaw stems from improper handling of empty SHA1 usernames during digest authentication, allowing unauthenticated attackers to bypass authentication controls and gain administrative access to the system.

MitigationUpgrade Kentico Xperience to a version newer than 13.0.172. If immediate patching is not possible, review and restrict Staging Sync Server network access and monitor for unauthorized administrative changes.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
XperienceApplication
Affected:<= 13.0.172

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Check installed Kentico Xperience version
    Locate the Kentico Xperience installation and identify the exact version number (typically found in the CMS administration interface under 'About' or in assembly information files)
    Affected if The installed version is 13.0.172 or earlier (any version up to and including 13.0.172)
  2. Verify Staging Sync Server is enabled
    Access the Kentico Xperience administration settings and check whether the Staging module and its sync server functionality are enabled. This is typically found in the Deployment > Staging or Settings > System > Staging section
    Affected if The Staging Sync Server feature is turned on or configured in the environment
  3. Confirm staging module is network-accessible
    Determine if the staging sync server endpoint is exposed to network access (internal or external). Check IIS bindings, firewall rules, or network configuration that allows HTTP/HTTPS requests to the staging server port
    Affected if The staging sync server endpoint is reachable over the network from untrusted sources
  4. Review staging user authentication configuration
    Inspect the staging sync server settings to confirm that digest authentication is in use and to identify any user accounts configured for staging synchronization
    Affected if Digest authentication is the configured method for staging sync server authentication

You are affected if your Kentico Xperience version is 13.0.172 or earlier AND the Staging Sync Server feature is enabled and network-accessible, allowing potential unauthenticated attackers to bypass authentication via empty SHA1 username validation flaw.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to a release after 13.0.172
Vendor patch devnet.kentico.com →
Interim mitigation

Upgrade Kentico Xperience to a version newer than 13.0.172. If immediate patching is not possible, review and restrict Staging Sync Server network access and monitor for unauthorized administrative changes.

Recommended fix High confidence

Kentico Xperience 13.0.173 or later (latest 13.x stable release with security hotfix)

  1. 1. Check the official Kentico security advisory at devnet.kentico.com for the specific hotfix or patched version number
  2. 2. Navigate to the Kentico Xperience download page or use the Kentico upgrade utility
  3. 3. Download and apply the latest Kentico Xperience 13.x hotfix that addresses this vulnerability (version higher than 13.0.172)
  4. 4. After upgrading, verify that the Staging Sync Server functionality still works correctly
  5. 5. Test the digest authentication mechanism to confirm the vulnerability is remediated
  6. 6. Review and apply any additional security configurations recommended in the security advisory
Caveat Minor: Review release notes for any breaking changes between 13.0.172 and the target version; test Staging Sync functionality after upgrade

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Xperience Exploited in the wild — priority engagement
  • Consultation3.0 h
  • Implementation6.0 h
  • Testing5.0 h
  • Review / QA3.0 h
17.0 hours of engineering $2,970
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An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $4,752.

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2025-2746 in production — separate from our analysis above.

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data