CVE-2025-54982

SAML 2.0 Public Key Validation Issue

State: Published
Severity: 9.6 Critical
Published: Aug 5, 2025
Updated: Feb 26, 2026
Reserved: Aug 4, 2025

Description

An improper verification of cryptographic signature in Zscaler's SAML authentication mechanism on the server-side allowed an authentication abuse.

Scores

CVSS	Score	Vector	Source
3.1	9.6 Critical	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N	Zscaler

Weaknesses

CWE-347 Improper Verification of Cryptographic Signature

Affected Products

Product	Versions
Authentication ServerZscaler	before 6.2rAffected

References

https://help.zscaler.com/zia/about-identity-providers

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