← Vulnerability feed

Vulnerability record · CVE-2021-3051 · published 8 September 2021

CVE-2021-3051: Paloaltonetworks cortex xsoar improper verification of cryptographic signature vulnerability

Paloaltonetworks · Cortex Xsoar

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.

8.1 CVSS 3.1 High EPSS 0.58% · top 54.4% CWE-347 · Improper verification of cryptographic signature
8.1CVSS 3.1 base score, v2 6.8
0.58%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://security.paloaltonetworks.com/CVE-2021-3051 Vendor Advisory
https://security.paloaltonetworks.com/CVE-2021-3051 Vendor Advisory

Track CVE-2021-3051 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2021-3044Paloaltonetworks cortex xsoar improper authorization vulnerabilityAn improper authorization vulnerability in Palo Alto Networks Cortex XSOAR enables a remote unauthenticated attacker with network access to the Corte…EPSS 1.4%7.2CVE-2026-0234Paloaltonetworks cortex xsiam improper verification of cryptographic signature vulnerabilityAn improper verification of cryptographic signature vulnerability exists in Cortex XSOAR and Cortex XSIAM platforms during integration of Microsoft T…EPSS 0.23%6.7CVE-2023-3282Paloaltonetworks cortex xsoar incorrect permission assignment vulnerabilityA local privilege escalation (PE) vulnerability in the Palo Alto Networks Cortex XSOAR engine software running on a Linux operating system enables a …EPSS 0.17%6.7CVE-2022-0031Paloaltonetworks cortex xsoar insufficient verification of data authenticity vulnerabilityA local privilege escalation (PE) vulnerability in the Palo Alto Networks Cortex XSOAR engine software running on a Linux operating system allows a l…EPSS 0.12%6.5CVE-2023-0003Paloaltonetworks cortex xsoar vulnerabilityA file disclosure vulnerability in the Palo Alto Networks Cortex XSOAR server software enables an authenticated user with access to the web interface…EPSS 1.3%5.4CVE-2022-0020Paloaltonetworks cortex xsoar cross-site scripting vulnerabilityA stored cross-site scripting (XSS) vulnerability in Palo Alto Network Cortex XSOAR web interface enables an authenticated network-based attacker to …EPSS 1.7%5.1CVE-2021-3034Paloaltonetworks cortex xsoar sensitive information in log file vulnerabilityAn information exposure through log file vulnerability exists in Cortex XSOAR software where the secrets configured for the SAML single sign-on (SSO)…EPSS 0.17%4.8CVE-2026-0270Paloaltonetworks cortex xsoar path traversal vulnerabilityA path traversal vulnerability in Palo Alto Networks Cortex XSOAR engine software running on Linux allows an unauthenticated attacker on an adjacent …EPSS 0.20%

Source: NIST National Vulnerability Database (record CVE-2021-3051), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.