dbcve.org
Improper Signature VerificationWeakness · CWE-347

CVE-2025-40758

HIGH · 8.7 CVSS v3.1 Published 2025-08-14
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
96/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click

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
A vulnerability has been identified in Mendix SAML (Mendix 10.12 compatible) (All versions < V4.0.3), Mendix SAML (Mendix 10.21 compatible) (All versions < V4.1.2), Mendix SAML (Mendix 9.24 compatible) (All versions < V3.6.21). Affected versions of the module insufficiently enforce signature validation and binding checks. This could allow unauthenticated remote attackers to hijack an account in specific SSO configurations.

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 · high confidence

The Mendix SAML module has insufficient signature validation and binding checks in affected versions. This allows unauthenticated remote attackers to bypass SAML authentication and hijack user accounts in specific SSO configurations by crafting malicious SAML responses that are not properly validated.

MitigationUpgrade the Mendix SAML module to version V4.0.3 (Mendix 10.12), V4.1.2 (Mendix 10.21), or V3.6.21 (Mendix 9.24) or later to enforce proper signature validation and binding checks.

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

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
High
Privileges
None
User interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
None

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

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. Identify Mendix SAML module installation
    Review the Mendix project structure: check the 'userlib' folder for SAML module JAR files, or inspect the project metadata (.mpr file) for module dependencies containing 'SAML' or 'Sso'. In Mendix Studio Pro, open the 'App Explorer' and look for a 'SAML' or 'SAML20' module under 'Modules'.
    Affected if The SAML module is not present in the project.
  2. Determine SAML module version
    If a JAR file exists in userlib, examine its filename for the version string (e.g., 'com.mendix.saml_4.0.0.jar'). In Mendix Studio Pro, right-click the SAML module in 'App Explorer', select 'Show in Explorer', and check the module directory for version information in the 'mxversion' file or manifest.
    Affected if Unable to determine the installed version from project files.
  3. Verify SAML SSO configuration is active
    In Mendix Studio Pro, navigate to the SAML module settings: 'Project' > 'Settings' > 'Configurations', or locate the 'SAML' or 'SAML20' module in 'App Explorer' and open 'SAML_Configuration' > 'Administration'. Check if any IdP entries exist and are enabled.
    Affected if No SAML IdP connections are configured or all are disabled.
  4. Compare installed version against fixed releases
    Compare the version identified in step 2 against the known fixed versions: V4.0.3 for Mendix 10.12, V4.1.2 for Mendix 10.21, or V3.6.21 for Mendix 9.24. Any version lower than these thresholds is vulnerable.
    Affected if The installed SAML module version is below V4.0.3, V4.1.2, or V3.6.21 (matching the Mendix runtime version in use).

A user is affected if the Mendix SAML module is installed with a version lower than V4.0.3 (Mendix 10.12), V4.1.2 (Mendix 10.21), or V3.6.21 (Mendix 9.24) AND SAML authentication is configured with an active IdP.

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
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Upgrade the Mendix SAML module to version V4.0.3 (Mendix 10.12), V4.1.2 (Mendix 10.21), or V3.6.21 (Mendix 9.24) or later to enforce proper signature validation and binding checks.

Recommended fix High confidence

V3.6.21 (Mendix 9.24), V4.0.3 (Mendix 10.12), or V4.1.2 (Mendix 10.21) depending on your Mendix version

  1. 1. Identify the Mendix SAML module version currently deployed in your application
  2. 2. Determine which Mendix version your application is running on (9.24, 10.12, or 10.21 compatible)
  3. 3. Download the corresponding fixed SAML module version from the Mendix Marketplace or your vendor portal: For Mendix 9.24: upgrade to V3.6.21 or later; For Mendix 10.12: upgrade to V4.0.3 or later; For Mendix 10.21: upgrade to V4.1.2 or later
  4. 4. In your Mendix Studio Pro, open the application and navigate to the Marketplace or Module repository
  5. 5. Update the Mendix SAML module to the fixed version
  6. 6. After updating, fully test your SAML SSO authentication flow to ensure the signature validation and binding checks are functioning correctly
  7. 7. Verify that legitimate SSO logins work as expected before deploying to production
Caveat Review release notes for any breaking changes between your current version and the fixed version; standard upgrade within same major version typically has minimal risk

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

Have this fixed Scoped from the published advisory
  • Consultation2.0 h
  • Implementation1.0 h
  • Testing3.0 h
  • Review / QA1.0 h
7.0 hours of engineering $1,210
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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-2025-40758 in production — separate from our analysis above.

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What this is

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What belongs here
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  • Version or environment caveats, and links to real fixes
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