CVE-2021-33718

lowpriority · track · 21OT risk · elevatedEPSS 0.006 · 48 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.58% (48th) EPSS

CVSS 3.5 · low

Is it mine?

15 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · cisa_csaf_ot · nvd

EPSS · scored 2026-10-27

A vulnerability has been identified in Mendix Applications using Mendix 7 (All versions < V7.23.22), Mendix Applications using Mendix 8 (All versions < V8.18.7), Mendix Applications using Mendix 9 (All versions < V9.3.0). Write access checks of attributes of an object could be bypassed, if user has a write permissions to the first attribute of this object.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedMendix Applications using Mendix 7siemens_psirt
Update to V7.23.22 or later version
https://docs.mendix.com/releasenotes/studio-pro/7.23
FixedMendix Applications using Mendix 8siemens_psirt
Update to V8.18.7 or later version
https://docs.mendix.com/releasenotes/studio-pro/8.18
FixedMendix Applications using Mendix 9siemens_psirt
Update to V9.3.0 or later version
https://docs.mendix.com/releasenotes/studio-pro/9.3
FixedMendix Applications using Mendix 7cisa_csaf_ot
Update to V7.23.22 or later version
https://docs.mendix.com/releasenotes/studio-pro/7.23
FixedMendix Applications using Mendix 8cisa_csaf_ot
Update to V8.18.7 or later version
https://docs.mendix.com/releasenotes/studio-pro/8.18
FixedMendix Applications using Mendix 9cisa_csaf_ot
Update to V9.3.0 or later version
https://docs.mendix.com/releasenotes/studio-pro/9.3
WorkaroundMendix Applications using Mendix 7siemens_psirt
Add a new read attribute and move this up to become the first in the entity attribute table
WorkaroundMendix Applications using Mendix 8siemens_psirt
Add a new read attribute and move this up to become the first in the entity attribute table
WorkaroundMendix Applications using Mendix 9siemens_psirt
Add a new read attribute and move this up to become the first in the entity attribute table
WorkaroundMendix Applications using Mendix 7cisa_csaf_ot
Add a new read attribute and move this up to become the first in the entity attribute table
WorkaroundMendix Applications using Mendix 8cisa_csaf_ot
Add a new read attribute and move this up to become the first in the entity attribute table
WorkaroundMendix Applications using Mendix 9cisa_csaf_ot
Add a new read attribute and move this up to become the first in the entity attribute table

cvss

Technical severity, 0–10. One row per scoring source.

5.3

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 3.5–5.3

v2.03.5lowAV:N/AC:M/Au:S/C:N/I:P/A:Nprimary · NVD / NIST USexploitability 6.8 · impact 2.9

v3.15.3mediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:Nprimary · NVD / NIST USexploitability 1.6 · impact 3.6

v3.15.3mediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N/E:P/RL:O/RC:Csecondary · CISA US

v3.15.3mediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N/E:P/RL:O/RC:Csecondary · Siemens ProductCERT DE

v3.14.9mediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-863USCWE-863USCWE-863US

affected products (15)

Products and version ranges known to be affected.

Mendix Applications using Mendix 7all versionscisa_csaf_otUS
Mendix Applications using Mendix 8all versionscisa_csaf_otUS
Mendix Applications using Mendix 9all versionscisa_csaf_otUS
Siemens Mendix Applications using Mendix 7< V7.23.22cisa_csaf_otUS
Siemens Mendix Applications using Mendix 8< V8.18.7cisa_csaf_otUS
Siemens Mendix Applications using Mendix 9< V9.3.0cisa_csaf_otUS
Siemens Mendix Applications using Mendix 7All versions → V7.23.22enisa_euvdEU
Siemens Mendix Applications using Mendix 8All versions → V8.18.7enisa_euvdEU
Siemens Mendix Applications using Mendix 9All versions → V9.3.0enisa_euvdEU
siemens mendix7.0 → 7.23.22nvdUScpe:2.3:a:siemens:mendix:*:*:*:*:*:*:*:*
siemens mendix8.0 → 8.18.7nvdUScpe:2.3:a:siemens:mendix:*:*:*:*:*:*:*:*
siemens mendix9.0 → 9.3.0nvdUScpe:2.3:a:siemens:mendix:*:*:*:*:*:*:*:*
Siemens Mendix Applications using Mendix 7< V7.23.22siemens_psirtDE
Siemens Mendix Applications using Mendix 8< V8.18.7siemens_psirtDE
Siemens Mendix Applications using Mendix 9< V9.3.0siemens_psirtDE

advisories (2)

Vendor and ecosystem advisories describing this.

SSA-352521SSA-352521: Access Check Bypass Vulnerability in Mendix2021-07-13csaf · siemens_psirtDE
An incorrect authorization check in Mendix applications could allow an attacker to bypass write permissions to attributes of objects under certain circumstances. Mendix has released an update for Mendix and recommends to update to the latest version.
ICSA-21-194-16Siemens Mendix2021-07-13icsa · cisa_csaf_otUS
An incorrect authorization check in Mendix applications could allow an attacker to bypass write permissions to attributes of objects under certain circumstances. Mendix has released an update for Mendix and recommends to update to the latest version.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cisa_csaf_ot nvd siemens_psirt NVD CVE.org MITRE

published 2021-07-13modified 2026-06-17

references (5)

External citations — patches, advisories, analysis.

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