Is CVE-2023-28801 in the CISA KEV catalog?

No. CVE-2023-28801 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2023-28801?

CVE-2023-28801 has a CVSS v3 base score of 9.6 (CRITICAL).

What is the EPSS score for CVE-2023-28801?

CVE-2023-28801 has an EPSS score of 0.33% (25th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2023-28801?

Upgrade zscaler internet access admin portal to 6.2r or later.

CVE & CISA-KEV Catalog

CVE-2023-28801

CRITICAL

9.6

CVSS v3

NVD

Description

An Improper Verification of Cryptographic Signature in the SAML authentication of the Zscaler Admin UI allows a Privilege Escalation.This issue affects Admin UI: from 6.2 before 6.2r.

CWE-347

How to fix

Remediation Available

zscaler internet access admin portalNVD

Affected:>= 6.2, < 6.2rFixed in:6.2rCVE-2023-28801derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeChanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityNone

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

Exploit Intelligence

0.33%probability of exploitation in 30 days

25thpercentile

Low risk: more likely to be exploited than 25% of all known CVEs.

References

Release Notes1

help.zscaler.com

Related Vulnerabilities

Other CWE-347 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2018-16042	Medium	6.5	82%	-	-
CVE-2025-59718	Critical	9.8	66%	KEV	Fix
CVE-2025-25292	Critical	9.8	64%	-	Fix
CVE-2021-22160	Critical	9.8	53%	-	Fix
CVE-2013-3900	Medium	5.5	45%	KEV	-
CVE-2018-0114	High	7.5	43%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.