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MendixApplication

CVE-2021-42015

MEDIUM · 5.5 CVSS v3.1 Published 2021-11-09
Fix available
A fix is available. Upgrade to 7.23.26 / 8.18.12 or later.
See remediation →
57/100
Remediation priority · Elevated
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
A vulnerability has been identified in Mendix Applications using Mendix 7 (All versions < V7.23.26), Mendix Applications using Mendix 8 (All versions < V8.18.12), Mendix Applications using Mendix 9 (All versions < V9.6.1). Applications built with affected versions of Mendix Studio Pro do not prevent file documents from being cached when files are opened or downloaded using a browser. This could allow a local attacker to read those documents by exploring the browser cache.

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

A detailed technical summary for this CVE is being prepared.

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
MendixApplication
Affected:< 7.23.26>= 8.0.0, < 8.18.12>= 9.0.0, < 9.6.1

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
Local
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

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

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 7.23.26 / 8.18.12 / 9.6.1 or later
Fixed in 7.23.268.18.129.6.1
Vendor patch cert-portal.siemens.com →
Recommended fix High confidence

Mendix 7.23.26 (for v7 apps), Mendix 8.18.12 (for v8 apps), or Mendix 9.6.1 (for v9 apps)

  1. 1. Identify the current Mendix Studio Pro version used to build the application (check in Modeler under Help > About)
  2. 2. Based on the major version (7, 8, or 9), plan migration to the corresponding fixed version: 7.23.26, 8.18.12, or 9.6.1
  3. 3. Review the Mendix release notes for the target version to understand changes and any potential migration requirements
  4. 4. Create a complete backup of the application project and database
  5. 5. In a non-production environment (test/staging), upgrade the application to the fixed version using Mendix Studio Pro
  6. 6. Verify that all application functionality works correctly after upgrade
  7. 7. Once validated, deploy the upgraded application to production
Caveat Review Mendix release notes for the target version as minor version upgrades may include behavioral changes; test thoroughly in non-production first

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

We can perform the upgrade in your staging environment and verify nothing breaks — typical engagement from $1,600. Get the upgrade done

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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-2021-42015 in production — separate from our analysis above.

No notes yet

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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