How severe is CVE-2021-33718?

CVE-2021-33718 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2021-33718 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-33718?

CVE-2021-33718 affects Siemens Mendix. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-33718?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-33718 published?

CVE-2021-33718 was published on 2021-07-13 and last updated on 2026-06-17.

CVE-2021-33718

CVE-2021-33718 is a medium-severity vulnerability in Siemens Mendix with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-863.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 3.5
EPSS exploit prediction: 1% (44th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-863
Affected product: Siemens Mendix
Published: 2021-07-13
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2021-33718?: 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.
How severe is CVE-2021-33718?: CVE-2021-33718 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2021-33718 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-33718?: CVE-2021-33718 affects Siemens Mendix. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-33718?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-33718 published?: CVE-2021-33718 was published on 2021-07-13 and last updated on 2026-06-17.

References

https://cert-portal.siemens.com/productcert/pdf/ssa-352521.pdf

Affected products (1)

cpe:2.3:a:siemens:mendix:*:*:*:*:*:*:*:*

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