How severe is CVE-2021-31339?

CVE-2021-31339 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2021-31339 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-31339?

CVE-2021-31339 affects Mendix Excel Importer. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-31339?

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

When was CVE-2021-31339 published?

CVE-2021-31339 was published on 2021-05-12 and last updated on 2026-06-17.

CVE-2021-31339

CVE-2021-31339 is a medium-severity vulnerability in Mendix Excel Importer with a CVSS 3.x base score of 4.3. 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-209.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v2: 4.0
EPSS exploit prediction: 1% (51st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-209
Affected product: Mendix Excel Importer
Published: 2021-05-12
Last modified: 2026-06-17

Description

A vulnerability has been identified in Mendix Excel Importer Module (All versions < V9.0.3). Uploading a manipulated XML File results in an exception that could expose information about the Application-Server and the used XML-Framework.

Frequently asked questions

What is CVE-2021-31339?: A vulnerability has been identified in Mendix Excel Importer Module (All versions < V9.0.3). Uploading a manipulated XML File results in an exception that could expose information about the Application-Server and the used XML-Framework.
How severe is CVE-2021-31339?: CVE-2021-31339 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2021-31339 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-31339?: CVE-2021-31339 affects Mendix Excel Importer. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-31339?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-31339 published?: CVE-2021-31339 was published on 2021-05-12 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:mendix:excel_importer:*:*:*:*:*:*:*:*

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