by Kastro
Paper/Archive/CVE-2025-54982

CVE-2025-54982

Zscaler Authentication Server — SAML 2.0 Public Key Validation Issue

EPSS 0.4%CVSS 9.6
critical.is priorityof 100
36
CVSS 9.6 (CNA)9.6 / 10 × 3028.8Not in CISA KEV+300.0EPSS percentile 35.3.353 × 207.1No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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

Affected

ProductAffectedFixed inSource
Authentication Server< 6.2r6.2rCNA

Scores by source

Zscaler (CNA)9.6CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

refhelp.zscaler.com/zia/about-identity-providers