VULNERABILITY INTELLIGENCE

CVE-2019-10201

CVSS score8.1 HIGH

EPSS probability0.71%

CISA KEVNot currently listed

Published2019-08-14

Last modified2026-06-17

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Description

It was found that Keycloak's SAML broker, versions up to 6.0.1, did not verify missing message signatures. If an attacker modifies the SAML Response and removes the <Signature> sections, the message is still accepted, and the message can be modified. An attacker could use this flaw to impersonate other users and gain access to sensitive information.

Weakness classification

CWE-347: Improper Verification of Cryptographic Signature
CWE-592: DEPRECATED: Authentication Bypass Issues

Primary references

secalert@redhat.com — Issue Tracking, Mitigation, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108 — Issue Tracking, Mitigation, Vendor Advisory