CVE-2020-1677: Juniper Networks Mist Cloud UI: SAML authentication attribute elements handling vulnerability.

Severity: medium (CVSS 4.3 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-10-16 · updated 2026-06-17
Weakness: CWE-20

Description

When SAML authentication is enabled, Juniper Networks Mist Cloud UI might incorrectly handle child elements in SAML responses, allowing a remote attacker to modify a valid SAML response without invalidating its cryptographic signature to bypass SAML authentication security controls. This issue affects all Juniper Networks Mist Cloud UI versions prior to September 2 2020.

Affected products

Juniper Networks MIST Cloud UI: before 2020-09-02 — fixed in 2020-09-02

How to fix

Upgrade to a fixed version: Juniper Networks MIST Cloud UI 2020-09-02. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2020-1677 or the next vulnerability affects your stack