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Fencer Vulns
medium 5.5

CVE-2021-42015 json

A vulnerability has been identified in Mendix Applications using Mendix 7 (All versions < V7.23.26), Mendix Applications using Mendix 8 (Al…

published 2021-11-09 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-29003

cvss
5.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 13%
public exploits
0
none known

Summary

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.

Patch / fix

  • mendix mendix 7.23.26, 8.18.12, 9.6.1

Vendor advisories

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

cisa ICSA-21-315-04 updated cvss 4.0

Siemens Mendix

  • Siemens Mendix Applications using Mendix 7 <V7.23.26
    affected: fixed in V7.23.26, workaround docs.mendix.com
  • Siemens Mendix Applications using Mendix 8 <V8.18.12
    affected: fixed in V8.18.12, workaround docs.mendix.com
  • Siemens Mendix Applications using Mendix 9 <V9.6.1
    affected: fixed in V9.6.1, 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

0.23% chance of exploitation in the next 30 days, higher than 13% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
NVD 2.0 1.9 AV:L/AC:M/Au:N/C:P/I:N/A:N

Affected products

  • Siemens Mendix Applications using Mendix 7
  • Siemens Mendix Applications using Mendix 8
  • Siemens Mendix Applications using Mendix 9

Classification

Weakness
  • CWE-525 Use of Web Browser Cache Containing Sensitive Information

References

Sources

Fencer Vulns 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.