CVE-2021-3051: Cortex XSOAR: Authentication Bypass in SAML Authentication

Severity: high (CVSS 8.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-09-08 · updated 2026-06-17
Weakness: CWE-347

Description

An improper verification of cryptographic signature vulnerability exists in Cortex XSOAR SAML authentication that enables an unauthenticated network-based attacker with specific knowledge of the Cortex XSOAR instance to access protected resources and perform unauthorized actions on the Cortex XSOAR server. This issue impacts: Cortex XSOAR 5.5.0 builds earlier than 1578677; Cortex XSOAR 6.0.2 builds earlier than 1576452; Cortex XSOAR 6.1.0 builds earlier than 1578663; Cortex XSOAR 6.2.0 builds earlier than 1578666. All Cortex XSOAR instances hosted by Palo Alto Networks are protected from this vulnerability; no additional action is required for these instances.

Affected products

Palo Alto Networks Cortex XSOAR: 5.5.0, 5.5.0-70066, 5.5.0-73387, 5.5.0-75211, 5.5.0-78518, 5.5.0-94592 (+16)
Palo Alto Networks Cortex XSOAR: from 5.5.0 before 1578677; from 6.0.2 before 1576452; from 6.1.0 before 1578663; from 6.2.0 before 1578666 — fixed in 1578677, 1576452, 1578663, 1578666

How to fix

Upgrade to a fixed version: Palo Alto Networks Cortex XSOAR 1578677, 1576452, 1578663, 1578666. Check the vendor advisory for mitigations.

References

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