CVE-2025-54982

SAML 2.0 Public Key Validation Issue

Published Aug 5, 2025 CVSS 3.1 · 9.6 Critical EPSS < 1% KEV · Not listed
Description
An improper verification of cryptographic signature in Zscaler's SAML authentication mechanism on the server-side allowed an authentication abuse.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2025-23602 An improper verification of cryptographic signature in Zscaler's SAML authentication mechanism on the server-side allowed an authentication abuse.
History
Type Values Removed Values Added
First Time appeared Zscaler
Zscaler authentication Server
Vendors & Products Zscaler
Zscaler authentication Server
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description An improper verification of cryptographic signature in Zscaler's SAML authentication mechanism on the server-side allowed an authentication abuse.
Title SAML 2.0 Public Key Validation Issue
Weaknesses CWE-347
References
Metrics cvssV3_1

{'score': 9.6, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Zscaler
Published
Updated
Feb 26, 2026, 5:49 PM
Reserved
Aug 4, 2025, 2:51 PM
Status
Deferred
Published
Aug 5, 2025, 6:15 AM
Modified
Jun 17, 2026, 9:41 AM