Juniper Networks Mist Cloud UI: SAML authentication attribute elements handling vulnerability.

published 2020-10-16 6y ago modified 2026-06-17 4mo ago also EUVD-2020-12539

cvss: 7.2; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 37%
public exploits: 0; none known

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.

Patch / fix

fixed in 1

Juniper Networks MIST Cloud UI 09/02/2020

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Exploit prediction

0.43% chance of exploitation in the next 30 days, higher than 37% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.2	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
NVD	2.0	4.3	AV:N/AC:M/Au:N/C:N/I:P/A:N

Affected products

Juniper Networks MIST Cloud UI

Classification

Weakness

CWE-20 Improper Input Validation
CWE-345 Insufficient Verification of Data Authenticity

References

kb.juniper.net /JSA11072
vendor-advisory

Sources

CVE List CVE-2020-1677
NVD CVE-2020-1677

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