What is CVE-2021-33712?

CVE-2021-33712 is a high-severity vulnerability in Mendix Saml, classified under Insufficient Verification of Data Authenticity. CVSS score: 8.8/10. Published 2021-06-08.

How severe is CVE-2021-33712?

High severity. CVSS v3 base score is 8.8 out of 10.

Vulnerability in Mendix Saml

CVE-2021-33712

A vulnerability has been identified in Mendix SAML Module (All versions < V2.1.2). The configuration of the SAML module does not properly check various restrictions and validations imposed by an identity provider. This could allow a remote authenticated attacker to escalate privileges.

Published 2021-06-08 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.006 (46.8th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 47th percentile — 46.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Mendix Saml
Siemens Mendix Saml Module — versions All versions < V2.1.2

Weakness classification (CWE)

CWE-345 — Insufficient Verification of Data Authenticity

References

cert-portal.siemens.com/productcert/pdf/ssa-522654.pdf (Third Party Advisory)

Frequently asked questions

What is CVE-2021-33712?: CVE-2021-33712 is a high-severity vulnerability in Mendix Saml, classified under Insufficient Verification of Data Authenticity. CVSS score: 8.8/10. Published 2021-06-08.
How severe is CVE-2021-33712?: High severity. CVSS v3 base score is 8.8 out of 10.