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Fencer Intel
medium 6.5

CVE-2021-42025 json

A vulnerability has been identified in Mendix Applications using Mendix 8 (All versions < V8.18.13), Mendix Applications using Mendix 9 (Al…

published 5y ago modified 4mo ago also EUVD-2021-29013

cvss
6.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 48%
public exploits
0
none known

Summary

A vulnerability has been identified in Mendix Applications using Mendix 8 (All versions < V8.18.13), Mendix Applications using Mendix 9 (All versions < V9.6.2). Applications built with affected versions of Mendix Studio Pro do not properly control write access for certain client actions. This could allow authenticated attackers to manipulate the content of System.FileDocument objects in some cases, regardless whether they have write access to it.

Patch / fix

  • mendix mendix 8.18.13, 9.6.2

Is CVE-2021-42025 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-21-315-05 updated cvss 5.3

Siemens Mendix Studio Pro

  • Siemens Mendix Applications using Mendix 8 <V8.18.13
    affected: fixed in V8.18.13, workaround docs.mendix.com
  • Siemens Mendix Applications using Mendix 9 <V9.6.2
    affected: fixed in V9.6.2, workaround docs.mendix.com

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

Exploit prediction

0.58% chance of exploitation in the next 30 days, higher than 48% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
NVD 2.0 6.8 AV:N/AC:L/Au:S/C:N/I:C/A:N

Affected products

  • Siemens Mendix Applications using Mendix 8
  • Siemens Mendix Applications using Mendix 9

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.