CVE-2023-25957Network attack vector

Unauthenticated application access via unchecked SAML assertions

Published Mar 14, 2023 · Updated Feb 27, 2025

Authentication bypass in affected Siemens Mendix SAML releases allows remote attackers to access protected applications through SAML SSO. The module accepts SAML assertions without sufficient verification, allowing an unauthenticated assertion to satisfy the application's login flow. Listed releases are exposed normally; later compatibility releases remain exposed only when the default Use Encryption option is disabled.

CVSS severity9.1
Critical
EPSS probability0.58%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in affected Siemens Mendix SAML releases allows remote attackers to access protected applications through SAML SSO. The module accepts SAML assertions without sufficient verification, allowing an unauthenticated assertion to satisfy the application's login flow. Listed releases are exposed normally; later compatibility releases remain exposed only when the default Use Encryption option is disabled.

The record

CVE
CVE-2023-25957
Published
Mar 14, 2023
Updated
Feb 27, 2025
Vendor
Siemens
Product
Mendix SAML
Classifications
CWE-287, CWE-303, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 14, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 27, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=All versions >= V1.16.4 < V1.17.3
  2. Affected versionversion=All versions >= V2.2.0 < V2.3.0
  3. Affected versionversion=All versions >= V3.1.8 < V3.2.6
  4. Affected versionversion=All versions >= V3.1.8 < V3.3.0
  5. Affected versionversion=All versions >= V3.1.9 < V3.2.7
  6. Affected versionversion=All versions >= V3.1.9 < V3.3.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Siemens · Mendix SAMLversion=All versions >= V1.16.4 < V1.17.3; version=All versions >= V2.2.0 < V2.3.0; version=All versions >= V3.1.8 < V3.2.6; version=All versions >= V3.1.8 < V3.3.0; version=All versions >= V3.1.9 < V3.2.7; version=All versions >= V3.1.9 < V3.3.1

Published CVSS scores

9.1Siemens AGCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-287Improper Authentication
CWE-303Incorrect Implementation of Authentication Algorithm
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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